Changes In Joint Motion Research Articles

Partial Lateral Meniscectomy Affects Knee Stability Even in Anterior Cruciate Ligament-Intact Knees.

The effects of a partial lateral meniscectomy on knee kinematics and forces in the lateral meniscus are critical to understand. The purpose of this study was to quantify the effects of varying sizes of partial lateral meniscectomies of the posterior horn and a total lateral meniscectomy on knee kinematics and resultant forces in the lateral meniscus. Using a robotic testing system, loads (134-N anterior tibial load + 200-N axial compression, 5-Nm internal tibial torque + 5-Nm valgus torque, and 5-Nm external tibial torque + 5-Nm valgus torque) were applied to 10 fresh-frozen cadaveric knees. The resulting joint motion and resultant forces in the lateral meniscus were determined for 4 knee states: intact, one-third and two-thirds partial lateral meniscectomies of the posterior horn, and total lateral meniscectomy. A decrease in lateral translation of the tibia (up to 166.7%) was observed after one-third partial lateral meniscectomies of the posterior horn compared with the intact knee, in response to an anterior load at all knee flexion angles tested (p < 0.05). One-third partial lateral meniscectomies of the posterior horn decreased the resultant forces in the lateral meniscus compared with the intact knee at all knee flexion angles tested in response to an anterior load (p < 0.05) and to an internal tibial torque (p < 0.05). The results of two-thirds partial lateral meniscectomies of the posterior horn were similar to those of one-third partial meniscectomies (p > 0.05). Total lateral meniscectomies further decreased the lateral translation of the tibia (up to 316.6%) compared with the intact knee in response to an anterior load (p < 0.05). The changes in joint motion and meniscal forces observed in this study after even small partial lateral meniscectomies may predispose knees to further injury. Surgeons should always consider repairing and minimizing the resection of even small lateral meniscal tears to prevent the potential deleterious effects of partial meniscectomy reported in this cadaveric study.

Algorithmically detectable directional changes in upper extremity motion indicate substantial myoelectric shoulder muscle fatigue during a repetitive manual task

Repetitive workplace tasks are associated with fatigue-induced changes to shoulder muscular strategies, potentially altering kinematics and elevating susceptibility to tissue overexposures. Accessible and reliable methods to detect shoulder muscle fatigue in the workplace are therefore valuable. Detectable changes in joint motion may provide a plausible fatigue identification method. In this investigation, the onset of the first kinematic changes, as identified by a symbolic motion representation (SMSR) algorithm, and the onset of substantial surface electromyography (sEMG) mean power frequency (MPF) fatigue were not significantly different, both occurring around 10% of task duration. This highlights the potential utility of SMSR identified directional changes in joint motion during repetitive tasks as a cue of substantial muscle fatigue, enabling ergonomics responses that can mitigate shoulder muscular fatigue accumulation and its associated deleterious physical effects.Practitioner Summary: The onset of substantial muscle fatigue during a repetitive dynamic task was assessed using kinematics and myoelectric-based techniques. Algorithmically detectable directional changes in upper extremity joint motion occurred with the onset of substantial muscle fatigue, highlighting the potential of this as a useful approach for workplace fatigue identification.

The Effect of Frequency Change on Human Elbow Joint Motion Change Induced by Vibration Stimulation under Various Load on Biceps Brachii

The Effect of Frequency Change on Human Elbow Joint Motion Change Induced by Vibration Stimulation under Various Load on Biceps Brachii

TERAPI DIATERMI GELOMBANG MIKRO DAN TRAKSI TRANSLASI PENDERITA HEMIPLEGIA DENGAN GANGGUAN GERAK SENDI BAHU DI RUMAH SAKIT FATMAWATI JAKARTA TAHUN 2015

Delaying in caring restricted shoulder’s joint motion among haemiplegia patients lead to worsen conditions, which are characterized by the limitations of active and passive movement on the entire movement of the shoulder joint. This study aims to determine the effect of Diathermy Micro Wave therapy and translational traction on the changes in joint motion of shoulder hemiplegia with frozen shoulder. This research uses pre-experiment pre-posttest one group design. The study population was hemiplegic patients with frozen shoulder movement dysfunction. The sample was 15 the patiens in the population those chosed based onpurposive sampling consideration with 30 - 50 years aged. The result of statistical analisys showed that paired t-test for the extent of exorotation of the shoulder joint before and after MWD and traction-translation revealed significant differences with p = 0.014 &lt;α = 0.05; wilcoxone test for abduction before and after administration of MWD and traction-translation made significant different with value of p=0.046 &lt; α=0.05; and wilcoxon test for endorotation shoulder joint area before and after administration of Diathermy Microwaves and traction-translations showed significant differences (p = 0.001 &lt;α = 0.05). The conclusion of this research is the provision of Diathermy Micro Wave intervention and traction-translation can increase the distance of motion abduction, exorotation and endorotation of shoulder joints of Hemiplegia patients with shoulder joint disfunction.

The Knee Joint Motion Change Induced by Vibration Stimulation on the Biceps Femoris Muscle and Semitendinosus Muscle during Continuous Knee Joint Flexion/Extension Motion

The Knee Joint Motion Change Induced by Vibration Stimulation on the Biceps Femoris Muscle and Semitendinosus Muscle during Continuous Knee Joint Flexion/Extension Motion

Effects of Rotator Cuff Pathology and Physical Therapy on In Vivo Shoulder Motion and Clinical Outcomes in Patients With a Symptomatic Full-Thickness Rotator Cuff Tear.

Background:Physical therapy (PT) is often prescribed for patients with rotator cuff tears. The extent to which PT influences strength, range of motion (ROM), and patient-reported outcomes has been studied extensively, but the effect of PT on in vivo joint kinematics is not well understood.Purpose:To assess the influence of symptomatic rotator cuff pathology and the effects of PT on shoulder motion, strength, and patient-reported outcomes.Study Design:Controlled laboratory study.Methods:Twenty-five patients with a symptomatic rotator cuff tear and 25 age-matched asymptomatic control subjects were recruited. Shoulder motion was measured using a biplane radiography imaging system, strength was assessed with a Biodex dynamometer, and patient-reported outcomes were assessed using the Western Ontario Rotator Cuff Index and visual analog scale (VAS) pain scores. Data were acquired from the patients before and after 8 weeks of physical therapy. Data were acquired at 1 time point for the control subjects.Results:Compared with the control subjects, patients with a symptomatic rotator cuff tear had significantly worse pain/function scores (P < .01); less ROM (P < .01); lower abduction (ABD), external rotation (ER), and internal rotation (IR) strength (P < .01); less scapulothoracic posterior tilt (P = .05); and lower glenohumeral joint elevation (P < .01). Physical therapy resulted in improved pain/function scores (P < .01), increased ROM (P < .02), increased scapulothoracic posterior tilt (P = .05), increased glenohumeral joint elevation (P = .01), and decreased acromiohumeral distance (AHD) (P = .02).Conclusion:Compared with age-matched controls, patients had worse pain/function scores, less ROM, and lower ABD, ER, and IR strength. Patients also had less scapulothoracic anteroposterior tilt, less glenohumeral joint elevation, and an altered glenohumeral joint contact path. PT resulted in improved pain/function scores, increased ROM, greater posterior scapulothoracic tilt, increased glenohumeral joint elevation, an increased range of superoinferior joint contact, and a lower mean AHD. Of these differences, PT only returned scapulothoracic tilt to control levels.Clinical Relevance:This study documents the effects of PT on shoulder motion and conventional clinical outcomes. It is expected that understanding how changes in joint motion are associated with conventional clinical outcomes will lead to improved nonoperative interventions for patients with rotator cuff tears.

Hand Function and Quality of Life Before and After Fasciectomy for Dupuytren Contracture

To describe changes in joint motion, sensibility, and scar pliability and to investigate the patients' expectations, self-reported recovery, and satisfaction with hand function, disability, and quality of life after surgery and hand therapy for Dupuytren disease. This prospective cohort study collected measurements before surgery and 3, 6, and 12 months after surgery and hand therapy. Ninety patients with total active extension deficits of 60° or more from Dupuytren contracture were included. Outcomes measures were range of motion; sensibility; scar pliability; self-reported outcomes on expectations, recovery, and satisfaction with hand function; Disabilities of the Arm, Shoulder, and Hand scores; safety and social issues of hand function; physical activity habits; and quality of life with the Euroqol. The extension deficit decreased, and there was a transient decrease in active finger flexion during the first year after surgery. Sensibility remained unaffected. Generally, patients with surgery on multiple fingers had worse scar pliability. The majority of the patients had their expectations met, and at 6 months, 32% considered hand function as fully recovered, and 73% were satisfied with their hand function. Fear of hurting the hand and worry about not trusting the hand function were of greatest concern among safety and social issues. The Disability of the Arm, Shoulder, and Hand score and the Euroqol improved over time. After surgery and hand therapy, disability decreased independent of single or multiple operated fingers. The total active finger extension improved enough for the patients to reach a functional range of motion despite an impairment of active finger flexion still present 12 months after treatment. Therapeutic IV.

The Effect of Foot Orthotics and Gait Velocity on Lower Limb Kinematics and Temporal Events of Stance

Research on foot orthotics is primarily restricted to their effect on the lower limb during running. Research is limited, however, on the potential of foot orthotics to control the mechanics of the foot during walking. The purpose of this study was to examine the interactive effect of foot orthotics and two walking speeds on the angular changes at the rearfoot, ankle, and knee, and temporal events during stance. Ten subjects demonstrating a minimum of 3 degrees of calcaneal eversion in relaxed standing participated in the project. All subjects routinely wore functional orthotics that were used during testing in conjunction with personal athletic shoes. Individuals were tested with and without the orthotics while walking on a treadmill at 2 and 3 mph. A four-camera motion analysis system was used to capture three-dimensional motion at 60 frames per second. Angle plots illustrated changes in joint motion at the knee, ankle, and rearfoot. Temporal data for heel strike, heel rise, and toe off of the foot during the stance were calculated. A two-factor repeated analysis of variance was used to determine the main and interactive effects of the orthotic and speed on the dependent variables. When walking with the orthotic, there was a significant reduction in the degree of pronation throughout stance as well as an increase in the duration of stance time as measured from heel strike to heel rise. The orthotic did not significantly reduce the velocity of pronation during the first 20% of stance. There was a speed effect for peak dorsiflexion and knee flexion.(ABSTRACT TRUNCATED AT 250 WORDS)

Serial Assessment and Treatment of a Humeral Fracture

Clinical problems at the glenohumeral joint, whether chronic or induced by trauma, tend to manifest joint hypomobility with accompanying. muscle weakness. Fractures at the proximal humerus tend to occur more frequently in older patients, but in the presence of violent trauma this injury may occur in the younger patient as well.' The initial treatment often includes some form of immobilization followed by remobilization and muscle strengthening. There is a clinical need to document the sequence and form of physical therapy treatment and quantitatively reflect changes in joint motion and strength. A case study of a patient with a proximal humeral fracture is presented to (a) dezcribe the clinical findings and treatment associated with a shoulder injury, (b) describe and illustrate some methods of assessment and treatment, and (c) report results for joint motion and muscle strength. The hope of the author is that this paper might provide an example of physical therapy evaluation and treatment for such a case and demonstrate a model for expected results. Further, this paper might be used as a teaching model for therapists who are unexperienced with this type of patient.J Orthop Sports Phys Ther 1980;2(1):25-34.