As a tool for investigating vestibulo-motor function, stochastic vestibular stimulation (SVS) has some advantages over galvanic vestibular stimulation. However, there is no technique currently available for extracting direction information from SVS-evoked motor responses. It is essential to be able to measure the direction of response if one wishes to investigate the operation of key spatial transformation processes in the brain. Here we describe and validate a technique for determining the direction of SVS-evoked balance responses based on the correlation between a random waveform of stimulating current and ground-reaction shear force.
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http://dx.doi.org/10.1113/jphysiol.2009.171256 | DOI Listing |
Front Sports Act Living
December 2024
Research Institute for Sport and Exercise, University of Canberra, Canberra, ACT, Australia.
Previous research has demonstrated that postural stability may be improved by increasing stimulation to the somatosensory system. Wearing lower limb compression garments or textured in-soles have been found to be effective short-term methods for improving postural stability, hypothesized to be due to enhanced tactile feedback. The aim of this study was to assess whether a combined compression-tactile sock increases postural stability in healthy adults, compared to barefoot.
View Article and Find Full Text PDFOtol Neurotol Open
December 2024
Department of Head and Neck Surgery, Los Angeles, California.
Objectives: Ramsay Hunt syndrome (RHS) refers to a reactivation of the varicella-zoster virus in the distribution of the facial nerve, but it can involve other cranial nerves as well. In patients with polyneuropathy, the vestibulocochlear nerve is most involved after the facial nerve. The clinical manifestations and long-term vestibular outcomes in these patients remain unclear.
View Article and Find Full Text PDFLin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
January 2025
This study aimed to compare the effects of cochlear implantation(CI) on vestibular function in patients with large vestibular aqueduct syndrome(LVAS) and in patients with extremely severe deafness with normal inner ear structure. A total of 28 LVAS patients and 28 patients with normal inner ear structure who suffered from extremely severe deafness were selected. The parameters of caloric tests, bone conduction evoked cervical vestibular-evoked myogenic potentials(cVEMP), bone conduction evoked ocular vestibular-evoked myogenic potentials(oVEMP) and video head impulse tests(v-HIT) were compared between the two groups before and after CI.
View Article and Find Full Text PDFEar Hear
December 2024
Department of Communication Sciences and Disorders, James Madison University, Harrisonburg, Virginia, USA.
Objectives: Cervical vestibular evoked myogenic potentials (cVEMPs) reflect saccular stimulation that results in an inhibitory muscle reflex recorded over the sternocleidomastoid muscle. These responses are utilized to study basic vestibular functions and are also applied clinically. Traditionally, cVEMPs have utilized transient stimuli such as clicks and tonebursts to evoke onset responses.
View Article and Find Full Text PDFClin Neurophysiol
December 2024
Department of Clinical Neurophysiology, Vall d'Hebron University Hospital, Passeig de la Vall d'Hebron, 119, 08035 Barcelona, Spain. Electronic address:
Introduction/objective: Biallelic expansion of the pentanucleotide AAGGG in the RFC1- gene is associated with cerebellar ataxia, neuropathy, and vestibular areflexia syndrome (CANVAS). This study aimed to comprehensively characterise this condition by conducting an in-depth neurophysiological examination of afflicted patients.
Methods: A retrospective analysis was conducted in 31 RFC1-positive patients.
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