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galvanic vestibular stimulation

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https://www.readbyqxmd.com/read/27869225/noisy-galvanic-vestibular-stimulation-induces-a-sustained-improvement-in-body-balance-in-elderly-adults
#1
Chisato Fujimoto, Yoshiharu Yamamoto, Teru Kamogashira, Makoto Kinoshita, Naoya Egami, Yukari Uemura, Fumiharu Togo, Tatsuya Yamasoba, Shinichi Iwasaki
Vestibular dysfunction causes postural instability, which is prevalent in the elderly. We previously showed that an imperceptible level of noisy galvanic vestibular stimulation (nGVS) can improve postural stability in patients with bilateral vestibulopathy during the stimulus, presumably by enhancing vestibular information processing. In this study, we investigated the after-effects of an imperceptible long-duration nGVS on body balance in elderly adults. Thirty elderly participants underwent two nGVS sessions in a randomised order...
November 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27847985/acute-peripheral-vestibular-deficit-increases-redundancy-in-random-number-generation
#2
Ivan Moser, Dominique Vibert, Marco D Caversaccio, Fred W Mast
Unilateral peripheral vestibular deficit leads to broad cognitive difficulties and biases in spatial orientation. More specifically, vestibular patients typically show a spatial bias toward their affected ear in the subjective visual vertical, head and trunk orientation, fall tendency, and walking trajectory. By means of a random number generation task, we set out to investigate how an acute peripheral vestibular deficit affects the mental representation of numbers in space. Furthermore, the random number generation task allowed us to test if patients with peripheral vestibular deficit show evidence of impaired executive functions while keeping the head straight and while performing active head turns...
November 15, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27820972/effects-of-repetitive-galvanic-vestibular-stimulation-on-spatial-neglect-and-verticality-perception-a-randomised-sham-controlled-trial
#3
Katharina Volkening, Georg Kerkhoff, Ingo Keller
Recent evidence shows that bipolar galvanic vestibular stimulation (GVS) with the cathode on the left (CL) or right (CR) mastoid ameliorates spatial neglect, extinction and verticality perception transiently and partly permanently. However, no randomised controlled trial evaluated the long-term effects of repetitive GVS in comparison to sham-GVS on exploration and verticality perception. To compare the effects of CL-GVS, CR-GVS and Sham-GVS on spatial exploration and verticality perception in right-hemispheric stroke patients with left neglect we conducted a randomised controlled trial with minimisation...
November 7, 2016: Neuropsychological Rehabilitation
https://www.readbyqxmd.com/read/27799703/effects-of-galvanic-vestibular-stimulation-on-event-related-potentials
#4
Jeong-Woo Lee, Woong-Sik Park, Se-Won Yoon
[Purpose] The purpose of this study was to examine the effects of galvanic vestibular stimulation on event-related potentials. [Subjects and Methods] Forty normal female adult subjects were randomly distributed to a galvanic vestibular stimulation application group (20 subjects) and sham group (20 subjects). For galvanic vestibular stimulation application, a positive electrode was applied to the right mastoid process, and a negative electrode was applied to the left mastoid process; simulation was applied for 10 minutes...
September 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/27752729/vision-can-recalibrate-the-vestibular-reafference-signal-used-to-re-establish-postural-equilibrium-following-a-platform-perturbation
#5
Adam J Toth, Laurence R Harris, John Zettel, Leah R Bent
Visuo-vestibular recalibration, in which visual information is used to alter the interpretation of vestibular signals, has been shown to influence both oculomotor control and navigation. Here we investigate whether vision can recalibrate the vestibular feedback used during the re-establishment of equilibrium following a perturbation. The perturbation recovery responses of nine participants were examined following exposure to a period of 11 s of galvanic vestibular stimulation (GVS). During GVS in VISION trials, occlusion spectacles provided 4 s of visual information that enabled participants to correct for the GVS-induced tilt and associate this asymmetric vestibular signal with a visually provided 'upright'...
October 17, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27730646/vestibular-feedback-maintains-reaching-accuracy-during-body-movement
#6
Craig P Smith, Raymond F Reynolds
KEY POINTS: Reaching movements can be perturbed by vestibular input, but the function of this response is unclear. Here, we applied galvanic vestibular stimulation concurrently with real body movement while subjects maintained arm position either fixed in space or fixed with respect to their body. During the fixed-in-space conditions, galvanic vestibular stimulation caused large changes in arm trajectory consistent with a compensatory response to maintain upper-limb accuracy in the face of body movement...
October 12, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27672673/data-on-galvanic-evoked-head-movements-in-healthy-and-unilaterally-labyrinthectomized-rats
#7
Moslem Shaabani, Yones Lotfi, Seyed Morteza Karimian, Mehdi Rahgozar, Mehdi Hooshmandi
In this dataset, we analyzed galvanic-evoked head movements (GEHMs) in the spatial planes of yaw, and roll in normal and unilaterally labyrinthectomized (UL) Wistar rats. The rats were assigned in 4 groups of 10: control, sham, right-UL and left-UL. Bilateral galvanic vestibular stimulation (GVS) was presented by our "ring-shaped electrode" design (see "Short-term galvanic vestibular stimulation promotes functional recovery and neurogenesis in unilaterally labyrinthectomized rats" (M. Shaabani et al., 2016) [1])...
December 2016: Data in Brief
https://www.readbyqxmd.com/read/27634181/long-term-exposure-to-microgravity-impairs-vestibulo-cardiovascular-reflex
#8
Hironobu Morita, Chikara Abe, Kunihiko Tanaka
The vestibular system is known to have an important role in controlling blood pressure upon posture transition (vestibulo-cardiovascular reflex, VCR). However, under a different gravitational environment, the sensitivity of the vestibular system may be altered. Thus, the VCR may become less sensitive after spaceflight because of orthostatic intolerance potentially induced by long-term exposure to microgravity. To test this hypothesis in humans, we investigated the ability of the VCR to maintain blood pressure upon head-up tilt before and after a 4-6 months stay on the International Space Station...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27627441/postural-effects-of-vestibular-manipulation-depend-on-the-physical-activity-status
#9
Julien Maitre, Thierry Paillard
The purpose of this study was to compare the effects of galvanic vestibular stimulation (GVS) on postural control for participants of different physical activity status (i.e. active and non-active). Two groups of participants were recruited: one group of participants who regularly practised sports activities (active group, n = 17), and one group of participants who did not practise physical and/or sports activities (non-active group, n = 17). They were compared in a reference condition (i.e bipedal stance with eyes open) and four vestibular manipulation condition (i...
2016: PloS One
https://www.readbyqxmd.com/read/27581452/galvanic-vestibular-stimulation-cellular-substrates-and-response-patterns-of-neurons-in-the-vestibulo-ocular-network
#10
Kathrin D Gensberger, Anna-Kristin Kaufmann, Haike Dietrich, Francisco Branoner, Roberto Banchi, Boris P Chagnaud, Hans Straka
UNLABELLED: Galvanic vestibular stimulation (GVS) uses modulated currents to evoke neuronal activity in vestibular endorgans in the absence of head motion. GVS is typically used for a characterization of vestibular pathologies; for studies on the vestibular influence of gaze, posture, and locomotion; and for deciphering the sensory-motor transformation underlying these behaviors. At variance with the widespread use of this method, basic aspects such as the activated cellular substrate at the sensory periphery or the comparability to motion-induced neuronal activity patterns are still disputed...
August 31, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27544925/sensorimotor-control-impairment-in-young-adults-with-idiopathic-scoliosis-compared-with-healthy-controls
#11
Jean-Philippe Pialasse, Pierre Mercier, Martin Descarreaux, Martin Simoneau
OBJECTIVE: It has been hypothesized that the impaired sensorimotor control observed in adolescents with idiopathic scoliosis (IS) may be related more to the onset of scoliosis than to the maturation of sensory systems or sensorimotor control mechanisms. The objective of this study was to assess sensorimotor control in adults diagnosed with IS in adolescence versus healthy controls. METHODS: The study included 20 young adults 20 to 24 years of age (10 healthy controls and 10 diagnosed with adolescent IS but not treated for it)...
September 2016: Journal of Manipulative and Physiological Therapeutics
https://www.readbyqxmd.com/read/27444558/short-term-galvanic-vestibular-stimulation-promotes-functional-recovery-and-neurogenesis-in-unilaterally-labyrinthectomized-rats
#12
Moslem Shaabani, Yones Lotfi, Seyed Morteza Karimian, Mehdi Rahgozar, Mehdi Hooshmandi
Current experimental research on the therapeutic effects of galvanic vestibular stimulation (GVS) has mainly focused on neurodegenerative disorders. However, it primarily stimulates the vestibular nuclei and could be potentially effective in modulating imbalance between them in the case of unilateral labyrinthectomy (UL). Fifty male Wistar rats (180-220g) were used in 5 groups of 10: intact, sham, right-UL (RUL; without intervention), and two other right-UL groups with GVS intervention [one group treated with low rate GVS (GVS...
October 1, 2016: Brain Research
https://www.readbyqxmd.com/read/27423517/synchronised-vestibular-signals-increase-the-p300-event-related-potential-elicited-by-auditory-oddballs
#13
Maren Schmidt-Kassow, David Wilkinson, Emma Denby, Heather Ferguson
The perception of beat within an auditory rhythm can be facilitated when accompanied by synchronised movements. Electrophysiological investigation shows that this facilitatory effect is associated with a larger P300 amplitude. It has remained unclear, however, which movement-related processes drive this P300 effect. To investigate whether vestibular signals play a role, we administered alternating, sub-sensory (mean=.3mA) galvanic current to the vestibular nerves of participants while they counted the number of oddballs presented in a stream of tones played at a rate of 1Hz...
October 1, 2016: Brain Research
https://www.readbyqxmd.com/read/27411812/imidazoleacetic-acid-ribotide-in-vestibulo-sympathetic-pathway-neurons
#14
Gay R Holstein, Victor L Friedrich, Giorgio P Martinelli
Imidazole-4-acetic acid-ribotide (IAARP) is a putative neurotransmitter/modulator and an endogenous regulator of sympathetic drive, notably systemic blood pressure, through binding to imidazoline receptors. IAARP is present in neurons and processes throughout the CNS, but is particularly prevalent in regions that are involved in blood pressure control. The goal of this study was to determine whether IAARP is present in neurons in the caudal vestibular nuclei that participate in the vestibulo-sympathetic reflex (VSR) pathway...
October 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27340990/increased-velocity-storage-in-subjects-with-meniere-s-disease
#15
Claudio Krstulovic, Nabil Atrache Al Attrache, Herminio Pérez Garrigues, Herminia Argente-Escrig, Luis Bataller Alberola, Constantino Morera Pérez
OBJECTIVE: Velocity storage mechanism is a multisensory rotation estimator; it compensates for errors in the information provided by the peripheral vestibular organs by means of an adjustment in the duration of the vestibular signal. The aim of this study was to determine the activity of the velocity storage mechanism in the presence of a labyrinthine disorder, using galvanic vestibular stimulation to cause direct activation of the vestibular afferent neurons. MATERIALS AND METHODS: Forty-one subjects with definite Meniere's disease (MD) and 36 healthy volunteers were evaluated using a 20-s galvanic vestibular stimulation...
April 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27232501/correction-vestibular-evoked-myogenic-potential-vemp-triggered-by-galvanic-vestibular-stimulation-gvs-a-promising-tool-to-assess-spinal-cord-function-in-schistosomal-myeloradiculopathy
#16
Júlia Fonseca de Morais Caporali, Denise Utsch Gonçalves, Ludimila Labanca, Leonardo Dornas de Oliveira, Guilherme Vaz de Melo Trindade, Thiago de Almeida Pereira, Pedro Henrique Diniz Cunha, Marina Santos Falci Mourão, José Roberto Lambertucci
[This corrects the article DOI: 10.1371/journal.pntd.0004672.].
May 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27169000/the-influence-of-scopolamine-on-motor-control-and-attentional-processes
#17
Emma Bestaven, Charline Kambrun, Dominique Guehl, Jean-René Cazalets, Etienne Guillaud
BACKGROUND: Motion sickness may be caused by a sensory conflict between the visual and the vestibular systems. Scopolamine, known to be the most effective therapy to control the vegetative symptoms of motion sickness, acts on the vestibular nucleus and potentially the vestibulospinal pathway, which may affect balance and motor tasks requiring both attentional process and motor balance. The aim of this study was to explore the effect of scopolamine on motor control and attentional processes...
2016: PeerJ
https://www.readbyqxmd.com/read/27164706/noisy-vestibular-stimulation-improves-dynamic-walking-stability-in-bilateral-vestibulopathy
#18
Max Wuehr, Eva Nusser, Julian Decker, Siegbert Krafczyk, Andreas Straube, Thomas Brandt, Klaus Jahn, Roman Schniepp
OBJECTIVE: To examine the effects of imperceptible levels of white noise galvanic vestibular stimulation (nGVS) on dynamic walking stability in patients with bilateral vestibulopathy (BVP). METHODS: Walking performance of 13 patients with confirmed BVP (mean age 50.1 ± 5.5 years) at slow, preferred, and fast speeds was examined during walking with zero-amplitude nGVS (sham trial) and nonzero-amplitude nGVS set to 80% of the individual cutaneous threshold for GVS (nGVS trial)...
June 7, 2016: Neurology
https://www.readbyqxmd.com/read/27128806/vestibular-evoked-myogenic-potential-vemp-triggered-by-galvanic-vestibular-stimulation-gvs-a-promising-tool-to-assess-spinal-cord-function-in-schistosomal-myeloradiculopathy
#19
COMPARATIVE STUDY
Júlia Fonseca de Morais Caporali, Denise Utsch Gonçalves, Ludimila Labanca, Leonardo Dornas de Oliveira, Guilherme Vaz de Melo Trindade, Thiago de Almeida Pereira, Pedro Henrique Diniz Cunha, Marina Santos Falci Mourão, José Roberto Lambertucci
BACKGROUND: Schistosomal myeloradiculopathy (SMR), the most severe and disabling ectopic form of Schistosoma mansoni infection, is caused by embolized ova eliciting local inflammation in the spinal cord and nerve roots. The treatment involves the use of praziquantel and long-term corticotherapy. The assessment of therapeutic response relies on neurological examination. Supplementary electrophysiological exams may improve prediction and monitoring of functional outcome. Vestibular evoked myogenic potential (VEMP) triggered by galvanic vestibular stimulation (GVS) is a simple, safe, low-cost and noninvasive electrophysiological technique that has been used to test the vestibulospinal tract in motor myelopathies...
April 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27108289/direct-perturbation-of-neural-integrator-by-bilateral-galvanic-vestibular-stimulation
#20
Kihwan Hong, Hyeon-Min Shim, Minsoo Goh, Seung-Yon Jang, Sangmin Lee, Kyu-Sung Kim
Caloric vestibular stimulation (CVS) and galvanic vestibular stimulation (GVS) act primarily on the peripheral vestibular system. Although the electrical current applied during GVS is thought to flow through peripheral vestibular organs, some current may spread into areas within the central nervous system, particularly when the bilateral galvanic vestibular stimulation (bGVS) method is used. According to Alexander's law, the magnitude of nystagmus increases with eccentric gaze movement, due to the function of the neural integrator (NI); thus, if the information for vestibular stimulation corresponds to Alexander's law, the peripheral vestibular organ is stimulated...
April 23, 2016: Medical & Biological Engineering & Computing
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