Effects Of Vestibular Stimulation Research Articles

Effect of Vestibular Stimulation on Balance and Gait in Parkinson’s Disease: A Systematic Review

Background/Objectives: Parkinson’s Disease (PD) can be associated with balance and gait impairments leading to increased risk of falls. Several studies have reported positive effects of various forms of vestibular stimulation (VS) for improving balance and stability in people with PD (PwP). The purpose of present study was to synthesise the current evidence on the effectiveness of VS, highlighting its potential benefits in improving postural stability and reducing gait impairments in people with Parkinson’s Disease. Method: A systematic search was conducted across databases Cochrane, Medline, PEDro, PubMed, Web of Science, and Google Scholar. Studies were included if they involved PwP at stages 3 or 4 of the Hoehn and Yahr scale, aged 60 years or older. The Risk of Bias (RoB) was assessed using the ROBINS-I tool. The review followed the PRISMA guidelines and the protocol was registered with PROSPERO (CRD42022283898). Results: demonstrated that various forms of VS have shown promise in mitigating symptoms of vestibular dysfunction and improving gait and balance in PwP. However, the overall RoB ranged from moderate to critical, with variations across different domains. Conclusions: While VS appears to offer potential benefits in improving balance and gait in PwP, the presence of biases in the reviewed studies necessitate caution in interpreting the results. Further research should focus on addressing these biases to confirm the therapeutic potential of VS in PD.

The Effect of Different Sensory Perturbations on Postural Control and Fall Risk in Benign Paroxysmal Positional Vertigo Patients.

Benign paroxysmal positional vertigo (BPPV) patients may experience balance problems in various environmental conditions other than positional dizziness. Therefore, there is a need to investigate the postural control abilities and the ability to use sensory inputs in BPPV patients in different conditions. The aim of this study was to examine the postural control performance of middle-aged adult BPPV patients in easy and difficult balance tasks, the effect of vestibular stimulation on the maintenance of balance, and the risk of falling, by posturographic evaluation in various conditions. A total of 26 patients diagnosed with posterior canal BPPV and 26 controls were included in the study. Sensory Organization Test (SOT), Vestibular Stimulation Test (VST), and fall risk assessment (FRA) were applied to the participants, respectively. Significant difference was observed in SOT medio-lateral (ML) plane in Conditions 2 and 5 (p < .05). A significant difference was observed in the vestibular score in the SOT ML plane. No significant difference was observed in VST test scores (p > .05). In the FRA test, a significant difference was observed in the energy and gain parameters in the anterio-posterior plane (p < .05). The current study examined postural control abilities of patients with BPPV in extensive external conditions and in both planes, using various sensory perturbations and stimulation. It was thought that while BPPV patients were in the active phase of the disease, their postural control skills in the ML plane decreased and they might be at risk of falling.

Design, development, and optimization of the Somnomat Casa: a rocking bed for sleep studies and nocturnal interventions in home settings

Abstract Vestibular Stimulation (VS) has been shown to positively affect various autonomic body functions, including sleep. In the past, VS was often investigated using large and complex rocking beds that would only allow for short intervention periods in constrained lab settings. In this work, we present an overview of the mechanics, kinematics, dynamics, and tuning of our latest rocking bed, the Somnomat Casa. Its compact dimensions, comparable to a standard single bed, its connectivity, and easy usability, allow for prolonged studies in home settings investigating the effects of VS during sleep. In a first six-month study with a 12-year-old boy suffering from primary mitochondrial disease with an associated severe sleep disorder, we observed significant improvements in sleep duration (+25 %) and quality of life, as well as a 75 % reduction in caregiving interactions and a 40 % reduction in overall caregiving time. Based on these promising findings, we are currently testing the Somnomat Casa with various patient groups for multiple months each, including elderly with insomnia, children with sleep disorders, Parkinson’s disease patients, and individuals with post-stroke insomnia.

The sex effect on balance control while standing on vestibular-demanding tasks with/without vestibular simulations: implication for sensorimotor training for future space missions.

Background: Anatomical differences between sexes in the vestibular system have been reported. It has also been demonstrated that there is a sex difference in balance control while standing on vestibular-demanding tasks. In 2024, NASA expects to send the first female to the Moon. Therefore, to extend the current knowledge, this study attempted to examine whether different sexes respond differently to vestibular-disrupted and vestibular-demanding environments. Method: A total of fifteen males and fifteen females participated in this study. The vestibular function was quantified through different SOT conditions (SOT1: baseline; SOT5: vestibular demanding by standing with blindfolded and sway reference surface). The vestibular stimulation (VS) was applied either unilaterally or bilaterally to vestibular system to induce the sensory-conflicted and challenging tasks. Thus, a total of 6 conditions (2 SOT conditions X 3 VSs: no-VS, unilateral VS, and bilateral VS) were randomly given to these participants. Three approaches can be quantified the balance control: 1) the performance ratio (PR) of center of gravity trajectories (CoG), 2) the sample entropy measure (SampEn) of CoG, and 3) the total traveling distance of CoG. A mixed three-way repeated ANOVA measure was used to determine the interaction among the sex effect, the effect of SOT, and the effect of VS on balance control. Results: A significant sex effect on balance control was found in the PR of CoG in the anterior-posterior (AP) direction (p = 0.026) and in the SampEn of CoG in both AP and medial-lateral (ML) directions (p = 0.025, p < 0.001, respectively). Also, a significant interaction among the sex effect, the effect of SOT, and the effect of VS on balance control was observed in PR of CoG in the ML direction (p < 0.001), SampEn of CoG in the AP and ML directions (p = 0.002, p < 0.001, respectively), and a traveling distance in AP direction (p = 0.041). Conclusion: The findings in the present study clearly revealed the necessity to take sex effect into consideration while standing in vestibular-perturbed or/and vestibular demanding tasks. Also, the results in the present study could be a fundamental reference for future sensorimotor training.

Anxiolytic effects of vestibular stimulation: an update.

The vestibular system inhibits both HPA and SAMaxis and contributes to the management of anxiety. Both direct and indirect pathways exist in the inhibition of the HPA and SAM axis. In this review article, the authors describe various pathways through which the vestibular system can regulate the HPA and SAM axis activity. Lastly, the authors highlight the need of starting translational research work in this field. Rocking is soothing and this is a universal fact that babies in the swing will calm down and sleep. These soothing effects of vestibular stimulation may be due to the inhibition of cortical and subcortical structures. Vestibular stimulation may be able to manage anxiety through its connections with multiple brain areas. There is a need to undertake translational research in this area to establish strong scientific evidence and recommend implementation of the vestibular stimulation in the management of anxiety.

Effects of vestibular stimulation on gait stability when walking at different step widths.

Vestibular information modulates muscle activity during gait, presumably to contribute to stability. If this is the case, stronger effects of perturbing vestibular information on local dynamic stability of gait, a measure of the locomotor system's response to small, naturally occurring perturbations, can be expected for narrow-base walking (which needs more control) than for normal walking and smaller effects for wide-base walking (which needs less control). An important mechanism to stabilize gait is to coordinate foot placement to center of mass (CoM) state. Vestibular information most likely contributes to sensing this CoM state. We, therefore, expected that stochastic electrical vestibular stimulation (EVS) would decrease the correlation between foot placement and CoM state during the preceding swing phase. In 14 healthy participants, we measured the kinematics of the trunk (as a proxy of the CoM), and feet, while they walked on a treadmill in six conditions: control (usual step width), narrow-base, and wide-base, each with and without stochastic EVS (peak amplitude of 5mA; RMS of ~ 1.2mA; frequency band from 0 to 25Hz). Stochastic EVS decreased local dynamic stability irrespective of step width. Foot placement correlated stronger with trunk motion during walking with EVS than without in the control condition. However, residual variance in foot placement was increased when walking with EVS, indicating less precise foot placement. Thus, a vestibular error signal leads to a decrease in gait stability and precision of foot placement, but these effects are not consistently modulated by step width.

IMPACT OF CALORIC VESTIBULAR STIMULATION ON CO-ORDINATION IN PARKINSON DISEASE INDUCED MICE

Objective: This study was undertaken to evaluate the effect of vestibular stimulation on motor coordination in Parkinson’s disease (PD) induced mice. Methods: 18 healthy adult male Swiss albino mice were used in this study. Vestibule was stimulated by caloric vestibular stimulation (CVS). Pesticide Rotenone was used to induce Parkinson’s disease (PD). Motor coordination was assessed by the fall-off time and the activity score using the rotarod and actophotometer, respectively. Results: In the rotarod test, there was a significant increase in the fall-off time (p&lt;0.01) in the CVS PD group (131.63±18.34) on the 30th day when compared to the PD group (95.33±15.17). In the actophotometer, the activity score improved in the PD CVS group on the 15 (235±47.09) and 30th days (251.38±25.76), while there was no improvement in the PD group. This shows the significant effect of caloric vestibular stimulation on motor coordination in Parkinson’s disease. Conclusion: This study confirms that caloric vestibular stimulation with hot water resulted in the improvement of motor coordination in PD. Hence this study certainly merits further studies with a higher sample size to confirm the effect of caloric vestibular stimulation on the enhancement of motor coordination in individuals with Parkinson’s disease.

EFFECT OF VESTIBULAR STIMULATION ON BEHAVIORAL CHANGES IN PARKINSON DISEASE-INDUCED MICE

Objective: This prospective study was conducted to provide an authoritative database for beneficial effects of vestibular stimulation, a simple non-invasive method to alleviate the behavioral changes in Parkinson’s disease (PD). Methods: Vestibule is stimulated by caloric vestibular stimulation (CVS). Pesticide Rotenone is used to induce PD. Open field test and elevated plus maze were used to access learning, memory, and behavior. Results: Behavioral scores were taken before and after stimulation of the vestibular system. The scores were significantly different between rotenone-induced PD, control, and hot water vestibular stimulation groups (p&lt;0.05). Conclusion: This study categorically confirms that CVS with hot water causes behavioral changes in PD. This study certainly merits further studies with higher sample sizes to confirm the effect of CVS for enhancement of learning, memory, and behavior in patients with Parkinsonism.

Effects of Vestibular Stimulation on Balance in Children with Quadriplegic Cerebral Palsy

Objective: The objective of the study was to determine the effects of vestibular stimulation on balance in quadriplegic cerebral palsy. Methodology: This was quasi experimental study in which total 44 quadriplegic cerebral palsy children were included who have no associated neurogenic conditions which may be aggravated with vestibular stimulation such as epilepsy or other orthopedic or functional complication. The children were assessed by an independent assessor before and after 6 weeks of vestibular stimulation. The assessment was made on gross motor measure and pediatric evaluation disability index. The data was analyzed using SPSS 20.0. Paired sample t test was used for pre-post testing. Results: The descriptive statistics of paired samples regarding Gross Motor Function Measure showed mean and standard deviation to be 49.61±1.75 and 64.54±1.04 before and after treatment, respectively. Paired sample testing for pre-post treatment measurement of mean score of Gross Motor Function Measure (GMFM) showed that mean difference and standard deviation found to be 14.93±1.90 with a significant p value 0.00. The descriptive statistics of paired samples regarding Total PEDI score showed mean and standard deviation to be 42.88±0.86 and 51.47±1.24 before and after treatment, respectively. Paired sample testing for pre-post treatment measurement of mean score of total Pediatric Evaluation Disability Inventory (PEDI) showed that mean difference and standard deviation found to be 8.59±1.48 with a significant p value 0.00. Conclusion: The findings of study concluded that vestibular stimulation has significant effect of vestibular stimulation on balance in quadriplegic cerebral palsy. Moreover, there were seen significant improvement in other domains such as behavior, emotions, psychology and interactive learning approach. Keywords: Cerebral Palsy, Quadriplegia, Child, Vestibular Stimulation

Vestibular Stimulation Causes Contraction of Subjective Time.

As the cerebellum is involved in vestibular and time-keeping processes, we asked if the latter are related. We conducted three experiments to investigate the effects of vestibular stimulation on temporal processing of supra-second durations. In Experiment 1, subjects had to perform temporal productions of 10- and 15-s intervals either standing on both feet or while being engaged in the difficult balancing task of standing on one foot with their eyes closed (or open for control purposes). In Experiment 2, participants were required to produce intervals of 5, 10, 15, and 20 s while standing on both feet with their eyes open or closed, which constituted an easier balancing task. In Experiment 3, we removed the active balancing; temporal productions of the same four durations had to be performed with the eyes open or closed during the passive vestibular stimulation induced by the oscillatory movements of a swing. Participants produced longer intervals when their eyes were closed, but active balancing was not the culprit. On the contrary, temporal over-production was particularly pronounced during the passive vestibular stimulation brought about by the swing movements. Taken together, the experiments demonstrate that the contraction of the subjective time during balancing tasks with closed eyes is most likely of vestibular origin.

Effectiveness of Vestibular Stimulation on Balance Using Swing Therapy in Children with Hypotonic Cerebral Palsy

Background: Hypotonic cerebral palsy is the non-progressive neurodevelopmental disorder of the immature brain that covers a board spectrum of syndromes which is related to motor and postural impairment, and balance problems during both gross and fine motor activities.Objective: To assess the effectiveness of vestibular stimulation on balance using swing therapy in children with hypotonic cerebral palsy. Methods: A single-blinded randomized clinical trial was conducted on sample of 52 patients with level-II motor functions on gross motor function classification system (GMFCS). All other types of cerebral palsy like Spastic, Athetoid and Ataxic were excluded from the study. Simple random sampling technique was used, data was collected from subjects visiting to Pediatric Physical Therapy Department, and randomly allocated into two groups; comprising 26 patients in each via lottery method. The Group A was treated with vestibular stimulation for balance by swing therapy and conventional methods of rehabilitation including; walking on parallel bars, proper positioning and stretching exercises and while in group B only conventional techniques was used. Swing therapy was given for total 8 weeks on alternate days for 15 minutes and post intervention effect was recorded on pediatric balance scale. Results: The mean age of patients was 5.83±1.92 years. For Group A and B, pre-treatment mean on pediatric balance scale was 3.07±1.24 and 3.03±1.31 and post-treatment mean was 1.51±1.72 and 2.69±1.61. The measured value of “t” score was (-3.76) and “P” value was (0.001) showing significant change, as this was less than the reference value 0.05. Conclusion: The current study concluded that swing therapy when integrated with other conventional methods of rehabilitation proved to be effective in improving balance in children with hypotonic cerebral palsy.

Caloric Vestibular Stimulation Induced Enhancement of Behavior and Neurotrophic Factors in Chronic Mild Stress Induced Rats.

Background: Caloric Vestibular Stimulation (CVS) is a non-invasive technique for stimulating the vestibular system. The vestibular system maintains equilibrium and acts as a moderator of mood, emotional control, and stress levels. Stress is a disruption of psychological, behavioral, and physiological homeostasis that affects people of all ages in today’s world. Thus, modest therapeutic procedures like vestibular stimulation can be practiced to effectively reduce stress. Hence, the purpose of the study was to determine the effect of vestibular stimulation on improving behavioral alterations and neurotrophic factors in rats exposed to Chronic Mild Stress (CMS). Methodology: The study employed 24 healthy male Sprague Dawley rats divided into four groups (n = 6). CMS was induced for 28 days with a variety of stimuli. Bilateral CVS with hot water (temperature ≈40°C) was started on Day 14 of CMS and continued for 15 days. On days 1, 15, and 28, locomotor activity (LA), wire grip strength (WGS), fall off time (FT), and immobilization time (IT) were measured, and the data were analyzed statistically. Additionally, neurotrophic factors such as Brain Derived Neurotrophic Factor (BDNF) and Glial cell line-Derived Neurotrophic Factor (GDNF) were observed in rats’ hippocampus. Results: On days 15 and 28, the CMS-induced group showed a significant reduction in LA, WGS, FT and IT in comparison to the control group. On day 28, the CVS-induced group demonstrated a significant increase in WGS, FT and IT when compared to the CMS group. Immunohistochemical analysis revealed that animals subjected to CMS had decreased BDNF and GDNF expression compared to the control group, indicating neuronal dysfunction in the hippocampus in response to stress. However, therapy with CVS increased BDNF and GDNF expression, thereby regenerating damaged hippocampus nerve terminals. Conclusion: The findings of the current study revealed that CVS is a safe and simple neuroprotective treatment against stress and a promising non-invasive technique for overcoming the motor symptoms associated with it. The findings may pave the way for future research and therapeutic applications of CVS for stress management.

Effect of vestibular stimulation on cold water stress-induced neurological changes in Wistar rats

The current study was undertaken to see the effects of cold-water stress on the brain and to evaluate the beneficial effect of vestibular stimulation on stress-induced brain changes. Healthy, male, Wistar rats, weighing 180 to 250 gm with 3-6 months of age, were used for the study. Stress was induced by making the animals swim in cold water maintained at 100C for 30 min a day, for 14 days. Following cold water swimming stress, bilateral hot water caloric vestibular stimulation was given to the animals using 410C temperature water for 15 days. Rats were sacrificed and histopathological brain changes were studied by Hematoxylin &amp; Eosin staining. Serum corticosterone level has increased significantly after cold water swimming stress (p&lt;0.01). Corticosterone was less in animals that received caloric vestibular stimulation in comparison with the animals which did not receive caloric vestibular stimulation (p&lt;0.05). Coldwater swimming stress had induced focal neuronal atrophy, nuclear pyknosis with congested blood vessels and infiltration of mononuclear inflammatory cells in the hippocampus and hypothalamus. Stressed animals that received caloric vestibular stimulation recovered well and showed the cerebral cortex with the normal neuroglial arrangement. Hypothalamus showed normal morphology and the hippocampus showed a pyramidal layer with a normal thickness in comparison to the animals which did not receive caloric vestibular stimulation. We conclude Caloric vestibular stimulation was effective in reversing the cold-water stress-induced serum corticosterone and histopathological changes in the brain.

Effects of vestibular stimulation on neurophysiologic impact among preterm infants - A systematic review

The preterm birth can have impact on child development. Hence the purpose of this systematic review is to find the effect of vestibular stimulation and its impact when given to preterm infant. The database search for this systematic review includes Google Scholar, PubMed, Pedro, Research Gate, and Cochrane. A Total of 96 articles were obtained using the key words search. The articles were filtered and sorted according to the inclusion and exclusion criteria.6 articles were selected for the review. The review search included all clinical trials in preterm babies (28-37 weeks) with the birth weight ranging from 1,000-2,000g, medically stable, stable vital signs and had a control group that did not receive any intervention in addition to the standard treatment provided by the NICU. The articles which did not contain, full text, appropriate data and published in any other language other than English were excluded. The review search analysis reflected that, vestibular stimulation for preterm infants is beneficial and necessary. Vestibular stimulation proves to have a significant amount of positive beneficial outcomes when compared to other stimulations. Assessment of the methodology of the studies reviewed herein showed that vestibular stimulation is efficient in determining the developmental behaviour, to enhance the respiratory functioning, to ensure physical growth, in promoting mature sleep and to maintain arousal state.

Delineating neural responses and functional connectivity changes during vestibular and nociceptive stimulation reveal the uniqueness of cortical vestibular processing

Vestibular information is ubiquitous and often processed jointly with visual, somatosensory and proprioceptive information. Among the cortical brain regions associated with human vestibular processing, area OP2 in the parietal operculum has been proposed as vestibular core region. However, delineating responses uniquely to vestibular stimulation in this region using neuroimaging is challenging for several reasons: First, the parietal operculum is a cytoarchitectonically heterogeneous region responding to multisensory stimulation. Second, artificial vestibular stimulation evokes confounding somatosensory and nociceptive responses blurring responses contributing to vestibular perception. Furthermore, immediate effects of vestibular stimulation on the organization of functional networks have not been investigated in detail yet. Using high resolution neuroimaging in a task-based and functional connectivity approach, we compared two equally salient stimuli—unilateral galvanic vestibular (GVS) and galvanic nociceptive stimulation (GNS)—to disentangle the processing of both modalities in the parietal operculum and characterize their effects on functional network architecture. GNS and GVS gave joint responses in area OP1, 3, 4, and the anterior and middle insula, but not in area OP2. GVS gave stronger responses in the parietal operculum just adjacent to OP3 and OP4, whereas GNS evoked stronger responses in area OP1, 3 and 4. Our results underline the importance of considering this common pathway when interpreting vestibular neuroimaging experiments and underpin the role of area OP2 in central vestibular processing. Global network changes were found during GNS, but not during GVS. This lack of network reconfiguration despite the saliency of GVS may reflect the continuous processing of vestibular information in the awake human.

Clinical Application of the Vestibular Stimulation Effect on Balance Disorders with Dementia.

In a previous study on Alzheimer's disease (AD), we showed that vestibular dysfunction derived from cerebral disorders contributes to balance disorders. No previous clinical study has attempted to prevent the progression of balance disorders in dementia patients through vestibular stimulation using an air caloric device. The purpose of this pilot study was to delay the progression of balance disorders by inducing vestibular compensation, specifically by utilizing the effect of vestibular stimulation to activate the cerebrum. Fifteen individuals were randomized and classified into a stimulation group or a nonstimulation group. Eight AD patients underwent vestibular stimulation every 2 weeks for 6 months in the stimulation group. Seven AD patients participated in the nonstimulation group (the control group). Both groups were subsequently evaluated using a Mini-Mental State Examination (MMSE), stepping test, caloric test, and smooth pursuit eye movement test just before starting the study and 6 months later. For balance parameters, the various tests did not show any significant differences between the two groups. However, in the stepping test, the decline rate tended to be higher in the nonstimulation group than in the stimulation group. The stimulation group's rate of decline in MMSE scores was lower than that of the nonstimulation group (p=0.015). No adverse events were tracked during the present study. Repeated vestibular stimulation might help patients retain greater balance and higher function. To prove these effects, the future clinical application will require an increased number of cases and longer periods of vestibular stimulation. This study showed that vestibular stimulation by air caloric device is safe and tolerable in patients with AD.

Effect of vestibular stimulation in cold water stress induced neurological changes

Effect of vestibular stimulation in cold water stress induced neurological changes

Comparative Study on Effect of Vestibular Stimulation and Tactile Stimulation along with Kinaesthetic Stimulation on Neuromuscular Development of Premature Infants

Comparative Study on Effect of Vestibular Stimulation and Tactile Stimulation along with Kinaesthetic Stimulation on Neuromuscular Development of Premature Infants

Effect of Vestibular Stimulation on Language Skills of Children with Attention Deficit and Hyperactivity Disorder

Aim: The purpose of the study was to evaluate the effect of vestibular stimulation on language in childrenwith Attention Deficit and Hyperactivity Disorder.Methodology: Total of 30 subjects with Attention deficit and hyperactivity disorder, 15 in experimental groupand 15 in control group with age of 4 to 6 years participated in this study. Both control and experimentalgroups were assessed using The Bzoch-League Receptive-Expressive Emergent Language Scale (Reels) forthe measurement of language skills in children.Result : Statistical significant is present (t = 3.8) in the experimental group with regard to effectiveness ofvestibular stimulation on language skills among ADHD children.Concusion: The conclusion of this study indicates that the vestibular stimulation activities are effective inimproving language skills in ADHD children.

Noisy galvanic vestibular stimulation effect on center of pressure sway during one-legged standing

Noisy galvanic vestibular stimulation (nGVS) involves the application of a weak, noisy, electrical current to the vestibular end organs and their afferent nerves, through electrodes placed bilaterally over the mastoid process. Center of pressure (COP) sway was shown to decrease during nGVS under conditions of static standing posture. However, whether nGVS can improve balance functions other than the static standing posture remains unclear. This study aimed to elucidate the effects of nGVS on COP sway during one-legged standing. We randomly assigned 36 participants to either a control group (sham stimulation), a 0.2 mA group (nGVS at 0.2 mA), or a 0.4 mA group (nGVS at 0.4 mA). All participants were measured for COP sway standing on one leg, with open eyes, both before and during stimulation. In the 0.2 mA group, the sway path length, mediolateral mean velocity, and anteroposterior mean velocity decreased during stimulation compared with before stimulation. Conversely, no significant differences in COP sway were detected for either the control group or the 0.4 mA group. The stimulation effects for all COP sway parameters were significantly higher in the 0.2 mA group than in either the control group or the 0.4 mA group. The results of this study suggested that nGVS not only decreases COP sway during static standing postures but can also reduce COP sway during one-legged standing.