Distal Motor Latency Research Articles

The Effects of Thermal and Pulsed Ultrasound on Pain and Function in Patients with Carpal Tunnel Syndrome: A Randomized Controlled Trial

ABSTRACT Objective While ultrasound therapy is common for carpal tunnel syndrome, the relative merits of thermal versus pulsed ultrasound remain unclear. This study compares their therapeutic effects. Design Randomized, double-blinded, placebo-controlled trial. Ninety-two adults aged 30-60 years with mild-moderate carpal tunnel syndrome (characteristic symptoms, positive clinical tests, abnormal electrophysiology) were randomized into 4 groups receiving 4 weeks night splinting plus 12 ultrasound sessions: Group A: 1 MHz, 1.0 W/cm2 continuous ultrasound for 5 minutes; Group B: 1 MHz, 25% duty cycle, 1.0 W/cm2 pulsed ultrasound for 15 minutes; Group C: 5 minutes thermal plus 15 minutes pulsed ultrasound; Group D: sham ultrasound for 15 minutes. Pain (VAS), function (DASH-Arabic), nerve conduction, and grip strength were measured at baseline, 4, and 8 weeks. Results Thermal and pulsed ultrasound groups improved in all outcomes versus placebo over 8 weeks (p < 0.05). Pulsed ultrasound decreased pain and distal motor latency more than placebo (p < 0.05). Thermal ultrasound increased sensory nerve action potentials versus placebo (p < 0.05). Conclusion Thermal and pulsed ultrasound with splinting improved pain, disability, grip strength, and nerve conduction in carpal tunnel syndrome. Pulsed ultrasound was optimal for pain and motor function, while thermal ultrasound enhanced sensory nerve function.

Evaluation of Split Hand Syndrome in Early Diagnosis of Amyotrophic Lateral Sclerosis by Nerve Conduction Study as a Diagnostic Tool

Background: Amyotrophic lateral sclerosis (ALS), a degenerative disease of the motor neurons that can present diversly. Needle electromyography (EMG) is the gold standard investigation for the diagnosis of ALS. Split hand syndrome (SHS) demonstrated by nerve conduction study (NCS); a noninvasive tool could be useful in diagnosing ALS. This study aimed to assess SHS by NCS in ALS. Methods: This diagnostic accuracy case-control study included 37 cases of ALS and 37 age and gender-matched controls. Compound muscle action potential (CMAP) and distal motor latency (DML) of median and ulnar nerves and the ratio of median and ulnar CMAP and DML were compared between study groups. The diagnostic validity testing of electrophysiological SHS was also done. Results: The mean age of the ALS and control groups were similar, 39.8±2.7 and 39.3±2.6 years, respectively. Sixteen (43.2%) ALS patients were in 30-59 years age group. Male-female ratio was 5.2. In the ALS group, median-ulnar CMAP ratio was lower and median-ulnar DML ratio was prolonged than the control. The diagnostic efficacy of median-ulnar CMAP ratio and DML ratio were calculated. A median-ulnar CMAP ratio cut-off value ≤1 showed 70% sensitivity, 97% specificity, 96% positive predictive value and 77% negative predictive value. A median-ulnar DML ratio cut-off value ≥1.5 showed 48% sensitivity, 89% specificity, 82% positive predictive value and 65% negative predictive value. Conclusion: NCS demonstrating SHS can be an important tool in the early diagnosis of ALS. J Bangladesh Coll Phys Surg 2024; 42: 350-354

Efficacy of Laser Acupuncture on Neurophysiological Parameters of Median Nerve and Hand Function in Postpartum Women: A Randomized Controlled Clinical Trial.

Objective: This study was conducted to ascertain the efficacy of photo acupuncture (PA) on the neurophysiological parameters of the median nerve and hand function in postnatal women. Background: Carpal tunnel syndrome (CTS) has been documented in up to 62% of pregnant females. PA, a noninvasive treatment that utilizes photo therapy on acupoints, could aid in the management of CTS. Material and Methods: Thirty-six postpartum women diagnosed with CTS depending on their medical history, physical examination, and electrodiagnostic study were distributed into two equal-sized groups at random. The PA group (n = 18) received PA for 12 min on the following acupuncture points: PC4, PC6, PC7, PC8, HT2, HT3, HT7, LI10, LI11, LI4, LU9, and LU10. The treatment was given 3 times weekly for four weeks; in addition, night splints were worn. Women in the control group (n = 18) just wore night splints. Before and after the 12-session treatment, each woman was assessed using an electrodiagnostic test to measure the motor distal latency (MDL), sensory distal latency (SDL), motor conduction velocity (MCV), sensory conduction velocity (SCV), pinch dynamometer for assessing pinch strength, and the Brief Michigan Hand Questionnaire (BMHQ) for assessing hand function. Results: A statistically significant improvement was observed in both groups after therapy regarding SDL, SCV, MDL, MCV, pinch strength, and BMHQ (p < 0.05) in favor of the PA group. Conclusion: Adding PA to a night splint should be suggested as an effective conservative therapy for CTS in postpartum women.

The Initial Clinical and Electrophysiological Characteristics of Different Subtypes of Guillain-Barré Syndrome Diagnosed Based on Serial Electrophysiological Examinations.

We aimed to identify different Guillain-Barré syndrome (GBS) subtypes, demyelination, axonal degeneration, and reversible conduction failure (RCF) as early as possible by analyzing the initial clinical and electrophysiological examinations. This study retrospectively collected GBS patients between October 2018 and December 2022 at Beijing Tiantan Hospital. The diagnostic criteria for the initial electrophysiological study were based on Rajabally's criteria, and the criteria for the serial electrophysiological study were based on Uncini's criteria. All subjects underwent clinical and electrophysiological evaluations at least twice within 8 weeks. A total of 47 eligible patients with GBS were included, comprising 19 acute inflammatory demyelinating polyradiculoneuropathy (AIDP), 18 axonal degenerations, and 10 RCFs. In the RCF group, 40%, 30%, and 30% patients were diagnosed as AIDP, axonal, and equivocal at the initial study, respectively. The AIDP group had significantly higher cerebrospinal fluid (CSF) protein than the RCF (123.8 [106.4, 215.1] mg/dL vs. 67.1 [36.8, 85.6] mg/dL, p=0.002) and axonal degeneration (123.8 [106.4, 215.1] mg/dL vs. 60.8 [34.8, 113.0] mg/dL, p<0.001) groups. The RCF group had significantly lower Hughes functional grades at admission (3 [2, 4] vs. 4 [4, 4], p=0.012) and discharge (1.0 [1.0, 2.0] vs. 3.0 [2.0, 3.0], p<0.001) than the axonal degeneration group and showed significantly shorter distal motor latency (DML), Fmin, Fmean, Fmax, and lower F% than the AIDP group (p<0.05). The early identification of RCF from AIDP had relatively obvious features, including slightly elevated CSF protein levels and normal or slightly prolonged DML and F-wave latencies, contrasting with the apparent elevation and prolongation seen in AIDP. Differentiating RCF from axonal degeneration remains challenging. One potential distinguishing factor is that the motor function in RCF tends to be better than in the latter.

Evaluation of the efficacy of low-level laser therapy in the treatment of ulnar neuropathy at the elbow in terms of symptoms and clinical and electrophysiological findings: a randomized, prospective, double-blind clinical trial.

Ulnar neuropathy at the elbow (UNE) is the second most common entrapment neuropathy and presents with symptoms such as pain, paresthesia, and weakness in the elbow. Provocative tests and electrophysiological examinations are helpful in the diagnosis of UNE. Low-level laser therapy is one of the conservative treatments of UNE however, limited results were reported on the effectiveness of low-level laser therapy (LLLT) in the treatment of UNE. In our study, we aimed to the efficacy of LLLT in reducing symptoms and providing clinical and electrophysiological improvement in patients with UNE. This study with a randomized-sham controlled, and double-blind design included 68 patients aged 18-60 years who were diagnosed with UNE. LLLT was applied to the first group, and sham laser was applied to the second group. The VAS pain, paresthesia, and weakness scores, grip strength, and provocative test positivity were evaluated in clinical examination. The QuickDASH questionnaire was administered to assess functional status. Electrophysiologically, motor distal latency (MDL) differences, sensory distal latency (SDL), motor and sensory nerve conduction velocity (NCV) were examined. Evaluations were performed before treatment and on the 15th day and at the third month after treatment. The LLLT group showed improvement in symptoms, clinical findings, motor NCV, and MDL at both post-treatment evaluations and sensory NCV on the post-treatment 15th day (p < 0.05). The comparison of post-treatment changes between the two groups revealed that the LLLT group had greater improvement in VAS day and night pain scores at both post-treatment evaluation times, QuickDASH scores at the third month, and sensory NCV on the 15th day (p < 0.05) compared to the SL group. There were no significant differences between the groups in terms of the post-treatment changes in VAS weakness scores, grip strength and electrophysiological findings (p > 0.05). It was observed that splinting alone was effective in UNE, but the addition of LLLT, one of the conservative treatment methods, enhanced treatment outcomes.

Normative data of upper limb nerve conduction in North Kerala population

Objectives: The objective of this study was to detect the normal motor amplitude, distal latency, conduction velocity, sensory amplitude, sensory latency and F-wave latency of upper limb nerves (Median nerve, ulnar nerve and radial nerve). Materials and Methods: It was a cross-sectional study conducted in the Department of Neurology, Government Medical College, Kozhikode, between 1 January 2022 and 31 December 2022. Nerve conduction studies (NCSs) were performed prospectively in the upper limbs of 311 carefully screened, healthy individuals of either sex, who were between the ages of 13 and 60 years, belonging to the North Kerala population, using the standardised technique. Results: The study population consisted of 54% males and 46% females. The mean age, height, weight and body mass index (BMI) of the study population were 39 ± 15 years, 163 ± 12 cm, 58 ± 11 Kgs and 22 ± 2.7 Kg/m2, respectively. The motor, sensory parameters and F-wave latency of median ulnar and radial nerves were established. We obtained a significant positive correlation between motor distal latency, sensory distal latency and F-wave latency of median and ulnar and radial nerves with age, height and weight. We obtained a significant negative correlation between motor distal amplitude, sensory distal amplitude and conduction velocity of median, ulnar, and radial nerves with age, height and weight. In our study, females had faster conduction velocity, shorter F-wave latency, motor distal latency, sensory latency and higher motor amplitude and sensory amplitude than males. BMI did not have a significant correlation with nerve conduction parameters in our study. Conclusion: Normative conduction parameters of commonly tested peripheral nerves of the upper limb were established for our electrophysiology laboratory. While performing NCS, it is essential to adapt values based on physiological factors such as age, gender, height, weight and BMI, which enhance the diagnostic sensitivity of the procedure and, thus, avoid misdiagnosis and mistreatment of various demyelinating and axonal disorders.

Local corticosteroid injection versus surgery for carpal tunnel syndrome.

Carpal tunnel syndrome (CTS) is a very common clinical syndrome manifested by signs and symptoms of irritation of the median nerve at the carpal tunnel in the wrist. Direct and indirect costs of CTS are substantial, with estimated costs of two billion US dollars for CTS surgery in the USA alone. Local corticosteroid injection has been used as a non-surgical treatment for CTS for many years, but its effectiveness is still debated. To evaluate the benefits and harms of corticosteroids injected in or around the carpal tunnel for the treatment of carpal tunnel syndrome (CTS) compared to surgery. We used standard, extensive Cochrane search methods. We searched the Cochrane Neuromuscular Specialised Register, CENTRAL, MEDLINE, Embase, CINAHL, ClinicalTrials.gov, and WHO ICTRP. The latest search was 26 May 2022. We included randomised controlled trials (RCTs) or quasi-randomised trials of adults with CTS that included at least one comparison group of local corticosteroid injection (LCI) into the wrist and one group of any surgical intervention. We used standard Cochrane methods. Our primary outcome was 1. improvement in symptoms at up to three months of follow-up. Our secondary outcomes were 2. functional improvement, 3. improvement in symptoms at greater than three months of follow-up, 4. improvement in neurophysiological parameters, 5. improvement in imaging parameters, 6. improvement in quality of life and 7. We used GRADE to assess the certainty of evidence for each outcome. We included seven studies involving 569 'hands' (although two studies had unusable data for quantitative analyses). All studies used a one-time LCI as a comparator, using several different types and doses of corticosteroids. In every study, for both surgery and LCI groups, all our primary and secondary outcomes showed improvement from pre- to post-treatment. However, evidence from the combined analysis was too uncertain for us to draw reliable conclusions for the comparison of surgical treatment versus LCI with respect to our primary outcome of symptom relief at up to three months' follow-up (standardised mean difference (SMD) 0.63, 95% confidence interval (CI) -0.61 to 1.88; I2 = 95%; 5 trials, 305 participants; very low-certainty evidence). Findings with respect to secondary outcome measures of symptom relief at greater than three months' follow-up (SMD 0.94, 95% CI -0.31 to 2.19; I2 = 93%; 4 trials, 235 participants), functional improvement at up to three months' follow-up (SMD -0.11, 95% CI -0.94 to 0.72; I2 = 84%; 3 trials, 215 participants) and functional improvement at greater than three months' follow-up (SMD 0.19, 95% CI -1.22 to 1.59; I2 = 93%; 3 trials, 185 participants) were also uncertain (very low-certainty evidence) and showed no clear advantage for surgery or LCI. Surgery may improve neurophysiology (median nerve distal motor latency) more than LCI (mean difference (MD) 0.87 ms, 95% CI 0.32 to 1.42; I2 = 72%; 3 trials, 162 participants; low-certainty evidence). Evidence for quality of life and adverse events was also uncertain; quality of life (EuroQol-5D-3L) may be slightly improved after LCI than after surgery (the difference may not be clinically important) (MD 0.07, 95% CI 0.02 to 0.12; 1 trial, 38 participants; very low-certainty evidence) and there may be fewer adverse events with LCI than with surgery (risk ratio (RR) 0.34, 95% CI 0.04 to 3.26; 3 trials, 112 participants; very low-certainty evidence). The evidence comparing LCI to surgery for CTS, either in the short term or up to 12 months' follow-up, is too uncertain for any reliable conclusions to be drawn.

The difference in nerve ultrasound and motor nerve conduction studies between autoimmune nodopathy and chronic inflammatory demyelinating polyneuropathy.

Nerve enlargement has been described in autoimmune nodopathy and chronic inflammatory demyelinating polyneuropathy (CIDP). However, comparisons of the distribution of enlargement between autoimmune nodopathy and CIDP have not been well characterized. To fill this gap, we explored differences in the ultrasonographic and electrophysiological features between autoimmune nodopathy and CIDP. Between March 2015 and June 2023, patients fulfilling diagnostic criteria for CIDP were enrolled; among them, those with positive antibodies against nodal-paranodal cell-adhesion molecules were distinguished as autoimmune nodopathy. Nerve ultrasound and nerve conduction studies (NCS) were performed. Overall, 114 CIDP patients and 13 patients with autoimmune nodopathy were recruited. Cross-sectional areas (CSA) at all sites were larger in patients with CIDP and autoimmune nodopathy than in healthy controls. CSAs at the roots and trunks of the brachial plexus were significantly larger in patients with anti-neurofascin-155 (NF155), anti-contactin-1 (CNTN1), and anti-contactin-associated protein 1 (CASPR1) antibodies than in CIDP patients. The patients with anti-NF186 antibody did not have enlargement in the brachial plexus. NCS showed more frequent probable conduction block at Erb's point in autoimmune nodopathy than in CIDP (61.9% vs. 36.6% for median nerve, 52.4% vs. 39.5% for ulnar nerve). Markedly prolonged distal motor latencies were also present in autoimmune nodopathy. Patients with autoimmune nodopathies had distinct distributions of peripheral nerve enlargement revealed by ultrasound, as well as distinct NCS patterns, which were different from CIDP. This suggests the potential utility of nerve ultrasound and NCS to supplement clinical characteristics for distinguishing nodopathies from CIDP.

Comparative Study between Platelet-Rich Plasma, Corticosteroids and Perineural Dextrose local Injections for Treatment of Carpal Tunnel Syndrome

Abstract Background Carpal tunnel syndrome (CTS), one of the most common entrapment neuropathies, is considered as a socio- economic issue that reduces work productivity and increases disability. Aim of the Work to compare the effect of Platelet- Rich Plasma (PRP), corticosteroids (CS) and perineural Dextrose 5 % in water (D5W) local injections for the treatment of idiopathic mild and moderate CTS. Patients and Methods A prospective study was performed on 60 median nerves of 60 patients. They were diagnosed as idiopathic CTS and classified randomly into 3 groups (each contains 20 patients) according to the treatment program received: group I (ultrasound guided CS injection), group II (ultrasound guided perineural Dextrose 5% injection) and group III (ultrasound guided PRP injection). Results Ultrasound guided local injection using single doses of CS, D5W, and PRP were very efficient as regards symptomatic and functional improvement, reducing distal motor latency (DML) and Peak sensory latency ( PSL) of median nerve, as well as decreased Cross Section Area (CSA) of Median nerve (MN) and improving median nerve mobility for idiopathic mild to moderate CTS. For symptom and functional improvement, single injection of CS was more effective than that of PRP and D5W within 3 months post-injection. Moreover, PRP was slightly better than D5W. For reducing DML and PSL, CS was the most effective followed by PRP and then D5W at 3 months post injection. For reducing CSA, CS was the most effective followed by PRP and then D5W at 3 months post injection. For improving mobility of median nerve, D5W was the most effective at 3 months post injection followed by CS and PRP. Conclusion Injection of CS, D5W and PRP had resulted in significant Boston Carpal Tunnel Syndrome Questionnaire (BCTQ) score reduction at 3 months post-injection in comparison to the BCTQ score at the baseline evaluation. All of the three studied groups (Corticosteroids, dextrose 5 % and PRP) have shown a great result regarding improving in clinical examination, clinical assessment scales, nerve conduction studies and improving in Neuromuscular Ultrasound results with favorable results of Corticosteroids group over Perineural dextrose 5 % group and PRP group.

Safety and effectiveness of ultrasound-guided single injection of 5% dextrose for median nerve hydrodissection in carpal tunnel syndrome

Background: In carpal tunnel syndrome (CTS), conservative management did not show satisfactory results, and some patients required revision surgery due to persistent or recurrent symptoms. Ultrasound (USG)-guided median nerve (MN) hydrodissection with a 5% dextrose injection is an advanced approach for treating symptoms of CTS. We prospectively investigated the patients to demonstrate the safety and effectiveness of this approach. Aims and Objectives: This study aims to evaluate the effect of USG-guided nerve hydrodissection using single injection of 5% dextrose on pain, MN conduction parameters, and functional status in patients with CTS of mild–to-moderate grade. The study also predicts about the safety of the procedure. Materials and Methods: A study was performed in the pain clinic of the tertiary care teaching institute of India for one year. The study included 15 patients diagnosed with mild-to-moderate CTS. The diagnosis was done on the basis of history, physical examination, and a nerve conduction velocity (NCV) study. Patients were given analgesics and NSAIDS and enrolled in the procedure. Parameters used for statistical analysis were Visual Analog Scale (VAS) scores, NCV study data (sensory conduction velocity [SNCV] and distal motor latency [DML]), and Boston carpal tunnel questionnaire (BCTQ) scores. Pre-injection parameters were compared with parameters 3 months after the injection to show the usefulness of this procedure. Results: A statistically significant reduction in VAS score was found in 74% of the cases (P&lt;0.05). The nerve conduction study parameters have shown significantly higher SNCV and lower DML latency in 60% of cases (P=0.001 and P=0.001, respectively). Improved BCTQ scores were found in 80% of cases (for the symptom severity scale, P=0.001 and for the functional status scale, P&lt;0.01). No complications such as allergic reactions, sensory loss, or paresis were recorded post-injection. However, transient injection site pain was present in all patients which did not last for more than 24 h. Conclusion: MN hydrodissection using a single injection of 5% dextrose under USG is a safe and effective approach offering pain relief, better MN conduction, and improved functional status in patients with CTS of mild-to-moderate grade.

Comparison of the Effectiveness of 2 Different Kinesio Taping Techniques Added to Exercises in the Treatment of Carpal Tunnel Syndrome: Randomized Controlled Trial, Double-Blind, Parallel Groups

ObjectiveTo compare the effectiveness of I-tape and button hole kinesio taping (KT) techniques added to exercises in the treatment of carpal tunnel syndrome (CTS). DesignProspective randomized controlled blinded study. SettingPhysical Medicine and Rehabilitation Outpatient Clinic. ParticipantsA total of 108 patients (165 wrists) diagnosed with CTS (N=108). InterventionsButton hole technique (BG), I-band technique (IG), and exercises (EG). Main Outcome MeasuresVisual analog scale (VAS), Douleur Neuropathique 4 Questions (DN4), Boston carpal tunnel syndrome questionnaire, and Jamar dynamometer were used. Median sensory nerve action potential (SNAP), compound muscle action potential (CMAP), median distal sensory latency (DSL), median distal motor latency (DML), sensory conduction velocity, and motor conduction velocity were recorded. Measurements were made at baseline, week 3, and week 12. ResultsThirty-six patients were in each group. Significant statistical improvements in VAS and DN4 scores were found in the BG and IG compared with EG (P<.05). Statistically significant improvements in hand grip strength were observed in the IG compared with the EG (P<.05). Significant improvements in DML levels and motor conduction velocity were observed in the BG and IG compared with the EG (P<.05). A significant increase in sensory conduction velocity was detected in the BG compared with the other groups (P<.05). ConclusionsBoth KT techniques are effective in terms of pain, functionality, symptom severity, grip strength, and electrophysiologically. The button hole technique was more effective in DSL, sensory conduction velocity, CMAP amplitude, and SNAP.

Unique clinical and electrophysiological features in the peripheral nerve system in patients with sialidosis – a case series study

BackgroundTo investigate the peripheral nervous system involvement in S sialidosis with typical features of myoclonus, seizure, and giant waves in somatosensory evoked potentials suggesting hyperexcitability in the central nervous system.MethodsThe clinical presentation of patients with genetically confirmed sialidosis was recorded. Neurophysiological studies, including nerve conduction studies (NCSs), F-wave studies, and needle electromyography (EMG), were performed on these patients.ResultsSix patients (M/F: 2:4) were recruited. In addition to the classical presentation, intermittent painful paresthesia was noted in four patients, and three of whom reported it as the earliest symptom. In the NCSs, one patient had reduced compound muscle action potential amplitudes in the right ulnar nerve, while another patient had prolonged distal motor latency in the bilateral tibial and peroneal nerves. Prolonged F-wave latency (83.3%), repeater F-waves (50%), and neurogenic polyphasic waves in EMG (in 2 out of 3 examined patients) were also noted. Interestingly, a very late response was noted in the F-wave study of all patients, probably indicating lesions involving the proximal peripheral nerve or spinal cord.ConclusionIn addition to the central nervous system, the peripheral nervous system is also involved in sialidosis, with corresponding clinical symptoms. Further study on these phenomena is indicated.

Nonalcoholic Fatty Liver Disease in Shift Workers and Its Effect on Peripheral Nerve Conduction: A Cross-Sectional Study.

Introduction Nonalcoholic fatty liver disease (NAFLD) presents as a multisystem disorder, heightening the risk of developing type 2 diabetes mellitus (T2DM) and cardiovascular diseases (CVDs). Occupation emerges as a significant factor influencing the occurrence of NAFLD. Research indicates that individuals engaged in shift work face an elevated risk of NAFLD, alongside obesity and T2DM, attributed to disruptions in their circadian rhythm, which precipitate hepatic steatosis and inflammation. Remarkably, peripheral neuropathy has been observed in conjunction with advanced liver disorders and NAFLD in the general population. However, the correlation between NAFLD and peripheral neuropathy remains unestablished in shift workers. Objective To identify NAFLD in seemingly healthy rotating shift workers and assess any potential impact of NAFLD on nerve function in this demographic. Methods This cross-sectional study involved 73 apparently healthy nonalcoholic security guards (aged 35 to 60 years) working in rotating shifts. The study included a comprehensive assessment, beginning with a medical history, an evaluation of physical activity, and anthropometric measurements. Confirmation of NAFLD was achieved through abdominal ultrasonography (USG), followed by the analysis of biochemical parameters. Motor and sensory nerve conduction studies (NCS) were conducted on participants with normal vitamin B12 levels using the Aleron electromyograph (EMG) machine (Recorders and Medicare Systems Private Ltd, Budanpur, India). The evaluation encompassed the Median and Common Peroneal motor nerves, as well as Median and Sural sensory nerves. Recorded parameters for motor nerves included distal motor latency (DML), compound muscle action potential (CMAP) amplitude, conduction velocity (CV), and F-wave minimum latency (F-wave), while sensory nerve parameters comprised sensory onset latency (SOL), sensory nerve action potential (SNAP) amplitude, and CV. Results Among 73 healthy security guards working in rotating shifts, 76.1% were diagnosed with NAFLD through abdominal ultrasound. Following participant withdrawals and exclusions due to vitamin B12 deficiency, a comparison of NCS parameters between NAFLD (n=24) and Non-NAFLD (n=12) groups revealed no significant disparities in motor or sensory parameters, except for a slightly diminished CMAP amplitude in the peroneal nerve of NAFLD subjects (8.21±2.83mV vs ±10.22±2.30 mV, p< 0.040). However, these differences fell within normal ranges, indicating no notable impact on peripheral nerve conduction in the presence of NAFLD. Conclusion The results indicate a high prevalence of NAFLD among individuals working rotating shifts. Moreover, the investigation suggests that despite the presence of NAFLD, there is no discernible influence on motor and sensory peripheral nerve conduction, particularly in common peroneal, median, and sural nerves.

Effectiveness of manual therapy to the Cervical Spine on clinical outcomes and electrodiagnostic tests in people with carpal tunnel syndrome: A randomized controlled trial

ObjectiveTo determine if cervical spine manual therapy (CMT) plus conventional physical therapy (PT) optimizes clinical objective and self-reported outcomes, compared to PT alone, in people with carpal tunnel syndrome (CTS). MethodForty-eight patients with the diagnosis of CTS were randomly divided into conventional PT (control group) and conventional PT plus cervical spine manual therapy (intervention group). All patients received 10 sessions of supervised conventional physical therapy (wrist splint, electrotherapy and wrist joint mobilization). Patients in the cervical spine manual therapy group also had manual therapies techniques given to their neck. Visual analog scale (VAS), Boston Carpal Tunnel Questionnaire (BCTQ), the disabilities of the arm, shoulder, and hand (DASH) questionnaire, median nerve motor distal latency (mMDL), and median sensory nerve conduction velocity (mSNCV) were assessed at three points: baseline, post-intervention, and six months later. ResultsThe cervical spine manual therapy group showed significantly greater improvement in VAS, DASH score, mMDL, and mSNCV in post-intervention and follow-up compared to the conventional group. There was no significant difference in two subscales of BCTQ at post-intervention for two groups, whereas these two subscales showed a significant difference in favor of the cervical manual therapy group at follow-up. ConclusionThe analysis of results showed that conventional CMT combined with PT could be more effective in improving the clinical outcomes and electrodiagnostic findings of patients with CTS compared to conventional PT only in the long term. Therefore, it can be suggested as a proper therapeutic method in CTS.

Steroid versus placebo injections and wrist splints in patients with carpal tunnel syndrome: a systematic review and network meta-analysis.

A network meta-analysis of randomized controlled trials compared the effectiveness of corticosteroid injections with placebo injections and wrist splints for carpal tunnel syndrome, focusing on symptom relief and median nerve conduction velocity. Within 3 months of the corticosteroid injection, there was a modest statistically significant difference in symptom relief compared to placebo injections and wrist splints, as measured by the Symptom Severity Subscore of the Boston Carpal Tunnel Questionnaire; however, this did not meet the minimum clinically important difference. Pain reduction with corticosteroids was slightly better than with wrist splints, but it also failed to reach clinical significance. Electrodiagnostic assessments showed transient changes in distal motor and sensory latencies in favour of corticosteroids at 3 months, but these changes were not evident at 6 months. The best current evidence suggests that corticosteroid injections provide minimal transient improvement in nerve conduction and symptomatology compared with placebo or wrist splints.

Effect of low level laser therapy versus pulsed ultrasound on postpartum carpal tunnel syndrome

Background. Carpal tunnel syndrome (CTS) is a major health issue that can impede postpartum women's activities and skills in both their personal and professional lives. Purpose. To compare the effectiveness of low-level laser therapy (LLLT) and pulsed ultrasound (US) in relieving postpartum CTS. Methods. Forty-eight women with mild to moderate CTS were divided into three groups. In addition to wrist exercises, Group (A) (n = 16) received LLLT, Group (B) (n = 16) received pulsed US, and Group (C) (n = 16) performed wrist exercises alone. For all groups, the treatment sessions were applied to the affected hand, 3 sessions weekly for four weeks. All postpartum women were evaluated pre- and post-treatment via a visual analogue scale (VAS) for pain intensity, the Boston Questionnaire of CTS (BCTS) for diagnosing CTS symptoms, electromyography for measuring motor conduction velocity (MCV), sensory conduction velocity (SCV), motor distal latency (MDL), and sensory peak latency (SPL), and a hand grip dynamometer for assessing hand grip strength. Results. All measured variables were significantly improved in the three groups post-treatment compared to pre-treatment. Between-groups comparison showed a highly significant decrease in the VAS, BCTS, and SPL and a significant increase of SCV and hand grip strength between groups A and C in favor of group A and between groups B and C in favor of group B, while the significant change in MDL and MCV was found between groups A and C only in favor of group A (p &lt; 0.05), with no significant change in all outcome measures between groups A and B (P &gt; 0.05). Conclusion. Either LLLT or pulsed US are useful modalities that can be used as an effective conservative therapy for alleviating postpartum CTS.

Electrophysiological variations of Guillain-Barre syndrome in Bangladesh- Hospital based study

Introduction: Guillain-Barre syndrome (GBS) is an immune mediated disorder of peripheral nerves which usually presents by rapidly evolving ascending weakness &amp; mild sensory loss and hypo- or areflexia. Electrodiagnostic study (EDS) is the basis for classification of different subtypes of the disease. EDS also has a crucial role in diagnosis, ruling out of some differential diagnosis like myopathic and motor neuron disorders and confirming the neuropathic nature of GBS. The benefit of immunotherapy is greatest when introduced early. In addition, electrophysiological characteristic can predict the prognosis of patients with GBS. This study was conducted to determine the predominant subtype and electrophysiological pattern of GBS in the context of Bangladesh. Objectives: Objective of this study was to compare the electrophysiological variations among different electrophysiological subtypes of GBS. Methods: It is an observational cross sectional study conducted in Department of Medicine and Neurology, Sir Salimullah Medical College &amp; Mitford Hospital and National Institute of Neuroscience (NINS), Dhaka, over a period of one year &amp; four months. Total 30 patients were selected by purposive sampling technique. Demographic data were collected from the patients and recorded in structured case report form. Clinical examination and relevant investigations were done meticulously. Collected questionnaire were checked to identify any error in data. Data was analyzed with SPSS version 21 software. Result: In this study, maximum numbers of patients 53% were between 21-30 years of age group with mean value 27.47±8.1 years. Male to female ratio was 1.7:1. Frequency of Guillain-Barre syndrome is predominance at middle age group. Commonest presentation was limb weakness (parapledgia or quadripledgia) in 60% patients, paresthesias &amp; numbness (40%), pain (100%) and deviation of mouth (63%) of GBS patients. Cerebrospinal fluid shows a mild pleocytosis (5 to 50 cells/µl) in majority of cases was found in 76% of patients. Whereas elevated CSF Protein (&gt;45 mg/dl) was seen in all GBS patient. Increased distal motor latency (DML) was found in 93% patients, whereas 7% patients had normal DML. In the case of the lower limbs, increased distal motor latency was predominant. Decreased amplitude of sensory nerve action potential (SNAP) was seen in 83% patients while 16% patients had normal. Slowing of motor conduction velocities, decreased amplitude as well as increase in distal motor latencies were observed, being more pronounced in the lower limbs. F-wave was completely absent in 20.0% patients while 20% patients showed decreased conduction velocity with prolonged latency. Sensory nerve action potential revealed that decreased sensory conduction velocity (SCV) was seen in 26%, absent SCV in 10% and normal SCV in 63% patients. Present study demonstrated that Acute inflammatory demyelinating polyneuropathy (AIDP) was the commonest type of Guillain-Barré syndrome, present in 56% of patient. Around 30% of the patients belonged to acute motor axonal polyneuropathy (AMAN) and 13% were acute motor sensory axonal polyneuropathy (AMSAN). Conclusion: In this study AIDP was the most frequent subtype. The characteristic findings supportive of AIDP include prolonged distal motor latencies, reduced conduction velocities, conduction blocks at non-entrapment sites, temporal dispersion and prolonged F wave latencies. J MEDICINE 2024; 25: 11-16

Perineural 5% dextrose versus corticosteroid injection in non-surgical carpal tunnel syndrom treatment.

<p>We aimed to investigate the difference of clinical and electrophysiological improvement between perineural corticosteroid injection therapy (PCIT) and perineural 5% dextrose injection therapy (5%PDIT) in carpal tunnel syndrome (CTS).</p>. <p>Total of 92 wrists that were diagnosed as mild-to-moderate idiopathic CTS and completed their follow-up were included in our study. The severity of pain, symptom severity and functional status were asses&shy;sed by visual analog scale (VAS) and the Boston Carpal Tunnel Syndrome Questionnaire (BCTQ) scores for treatment effectiveness. Randomized wrists were administered PCIT or 5%PDIT accompanied by ultrasound guidance. VAS, BCTQ scores and the electro&shy;physiological study repeated before and after treatment at the 1st and 6th months after perineural injection therapies (PITs) were recorded.</p>. <p>Compared with baseline data, within groups there was significant improvement in VAS, BCTQ severity and function scores at 1st and 6th months follow-up (all p &lt; 0.001). Considerable advance were detected in the median sensory nerve conduction velocity (SNCV) when pretreatment values were compared with posttreatment first month in both groups (p = 0.01; p &lt; 0.001, respectively). No significant change occurred in median distal motor latency (DML) values between the 1st and 6th months in the groups (p = 0.095; p = 0.113, respectively). No significant difference was observed bet&shy;ween 5%PDIT and PCIT groups.</p>. <p>Clinical and electrophysiologic improvement in CTS began from 1st month after PCIT and 5%PDIT. At the 6th month follow-up of the patients, 5%PDIT and PCIT had similar therapeutic effects. As a result, we can consider the replacement of PCIT with 5%PDIT in mild-to-moderate CTS patients especially in those who are hesitant because of the corticosteroid&rsquo;s adverse effects.</p>.

A review of the clinical and epidemiological aspects of Guillain-Barré syndrome in patients infected with SARS-CoV-2: An Extended Comprehensive Review

Since 2019, cases of patients with COVID-19 who developed Guillain-Barré Syndrome (GBS) have been reported. This review explores mechanisms that explain pathophysiology, clinical features, laboratory findings, and imaging characteristics in these patients.Methodology: A bibliographic search was made of studies on the topic published in NCBI and Scielo, between December 2019 and April 2022.Results: Ninety articles were found, 53 of which were included in this article. No studies were found that explain an association between GBS and COVID19. Specific clinical manifestations found were areflexia (56.95%), hyporeflexia (19.44%), muscle weakness (65.28%), gait disturbance (12.5%), hypoesthesia (26.39%), paresthesia (30.55%), and micturition disturbance (6.94%). The CSF findings included albumin-cytological dissociation (66.67%), and an average protein level of 140.23 mg/dL (SD: 106.71). Some cases reported enhancement of the cervical leptomeningeal, brainstem and cranial nerves on magnetic resonance imaging tests. The predominant variant of GBS was acute inflammatory demyelinating polyneuropathy (56.94%). The findings in the nerve conduction studies were the absence of F waves (61.54%), increased distal motor latency (80%), decreased motor amplitude (93.1%), and decreased motor conduction velocity (75%). In addition, the nerves mainly involved were the tibial (20.21%), peroneal (24.47%), median (20.21%), and ulnar (18.09%). The most frequent alteration of cranial nerves was bilateral (25%) and unilateral (13.89%) facial palsy.Conclusion: The primary GBS variant was Acute Inflammatory Demyelinating Polyneuropathy. Cerebrospinal fluid analysis revealed albumin-cytological dissociation as the most common finding, and MRI tests showed cranial nerves enhancements. An additional differential feature was the lower commitment of the autonomous system.

High-dose pharmaceutical-grade biotin in patients with demyelinating neuropathies: a phase 2b open label, uncontrolled, pilot study

BackgroundWe proposed to investigate high-dose pharmaceutical-grade biotin in a population of demyelinating neuropathies of different aetiologies, as a proof-of-concept.MethodsPhase IIb open label, uncontrolled, single center, pilot study in 15 patients (three groups of five patients) with chronic demyelinating peripheral neuropathy, i.e. chronic inflammatory demyelinating polyradiculoneuropathy, anti-myelin-associated glycoprotein neuropathy and Charcot-Marie-Tooth 1a or 1b. The investigational product was high-dose pharmaceutical-grade biotin (100 mg taken orally three times a day over a maximum of 52 weeks.The primary endpoint was a 10% relative improvement in 2 of the following 4 electrophysiological variables: motor nerve conduction velocity, distal motor latency, F wave latency, duration of the compound muscle action potential. The secondary endpoints included Overall Neuropathy Limitations Scale (ONLS) score, Medical Research Council (MRC) sum score, Inflammatory Neuropathy Cause and Treatment (INCAT) sensory sum score, 10-m walk test, 6-min walk test, posturography parameters, and nerve excitability variables.ResultsThe primary endpoint was reached in one patient. In the full population analysis, some secondary endpoints parameters improved: MRC score, INCAT sensory sum score, 6-min walk distance, strength-duration time constant, and rheobase. There was a positive correlation between the improvement in the 6-min walk distance and the strength-duration time constant. Regarding the safety results, 42 adverse events occurred, of which three were of severe intensity but none was considered as related to the investigational product.ConclusionsEven if the primary endpoint was not met, administration of high-dose pharmaceutical-grade biotin led to an improvement in various sensory and motor parameters, gait abilities, and nerve excitability parameters. The tolerance of the treatment was satisfactory.Trial registrationClinicalTrials.gov Identifier: NCT02967679; date 2016/12/05.