keyword
MENU ▼
Read by QxMD icon Read
search

vestibular stimulation

keyword
https://www.readbyqxmd.com/read/28190682/perception-of-active-head-rotation-in-patients-with-severe-left-unilateral-spatial-neglect
#1
Shinobu Kaibe, Manabu Okita, Hideto Kaba
Unilateral spatial neglect is a common neurological syndrome following predominantly right hemisphere damage, and is characterized by a failure to perceive and report stimuli in the contralesional side of space. To test the reference shift hypothesis that contralesional spatial neglect in right-brain-damaged patients is attributed to a rightward deviation of the egocentric reference frame, we measured the final angular position to which controls and left-side neglect patients actively turned their head toward the left in response to a verbal instruction given from each of three locations-right, left, and front-in two conditions, with and without visual feedback...
February 9, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28177166/splenius-capitis-is-a-reliable-target-for-measuring-cervical-vestibular-evoked-myogenic-potentials-in-adults
#2
A J Camp, C Gu, S L Cushing, K A Gordon, B D Corneil
The cervical vestibular evoked myogenic potential (cVEMP) is a common and simple test of vestibulospinal reflex patency. In the clinic, cVEMPs are measured in response to loud sounds from the sternocleidomastoid (SCM) on the ventral neck, as subjects maintain an uncomfortable head posture needed to recruit SCM. Here we characterize the cVEMP in a dorsal neck turner (Splenius Capitis; SPL), and compare it with the SCM cVEMP. cVEMPs were recorded simultaneously via surface electromyography from SCM and SPL from 17 healthy subjects in a variety of postures, including head-turned postures adopted while either seated or standing, and the clinical posture...
February 8, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28176264/the-integration-of-neural-information-by-a-passive-kinetic-stimulus-and-galvanic-vestibular-stimulation-in-the-lateral-vestibular-nucleus
#3
Gyutae Kim, Kyu-Sung Kim, Sangmin Lee
Despite an easy control and the direct effects on vestibular neurons, the clinical applications of galvanic vestibular stimulation (GVS) have been restricted because of its unclear activities as input. On the other hand, some critical conclusions have been made in the peripheral and the central processing of neural information by kinetic stimuli with different motion frequencies. Nevertheless, it is still elusive how the neural responses to simultaneous GVS and kinetic stimulus are modified during transmission and integration at the central vestibular area...
February 7, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28174524/ups-and-downs-in-75-years-of-electrocochleography
#4
REVIEW
Jos J Eggermont
Before 1964, electrocochleography (ECochG) was a surgical procedure carried out in the operating theatre. Currently, the newest application is also an intra-operative one, often carried out in conjunction with cochlear implant surgery. Starting in 1967, the recording methods became either minimal- or not-invasive, i.e., trans-tympanic (TT) or extra tympanic (ET), and included extensive studies of the arguments pro and con. I will review several valuable applications of ECochG, from a historical point of view, but covering all 75 years if applicable...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/28167905/a-possible-role-of-prolonged-whirling-episodes-on-structural-plasticity-of-the-cortical-networks-and-altered-vertigo-perception-the-cortex-of-sufi-whirling-dervishes
#5
Yusuf O Cakmak, Gazanfer Ekinci, Armin Heinecke, Safiye Çavdar
Although minutes of a spinning episode may induce vertigo in the healthy human, as a result of a possible perceptional plasticity, Sufi Whirling Dervishes (SWDs) can spin continuously for an hour without a vertigo perception.This unique long term vestibular system stimulation presents a potential human model to clarify the cortical networks underlying the resistance against vertigo. This study, therefore, aimed to investigate the potential structural cortical plasticity in SWDs. Magnetic resonance imaging (MRI) of 10 SWDs and 10 controls were obtained, using a 3T scanner...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28148642/gravity-dependence-of-the-effect-of-optokinetic-stimulation-on-the-subject-visual-vertical
#6
Bryan K Ward, Christopher J Bockisch, Nicoletta Caramia, Giovanni Bertolini, Alexander Andrea Tarnutzer
Accurate and precise estimates of direction of gravity are essential for spatial orientation. According to Bayesian theory, multisensory vestibular, visual and proprioceptive input is centrally integrated in a weighted fashion based on the reliability of the component sensory signals. For otolithic input, a decreasing signal-to-noise ratio was demonstrated with increasing roll-angle. We hypothesized that the weights of vestibular (otolithic) and extra-vestibular (visual/proprioceptive) sensors are roll-angle dependent and predicted an increased weight of extra-vestibular cues with increasing roll-angle, potentially following the Bayesian hypothesis...
February 1, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28128341/mastoid-vibration-affects-dynamic-postural-control-during-gait-in-healthy-older-adults
#7
Jung Hung Chien, Mukul Mukherjee, Jenny Kent, Nicholas Stergiou
Vestibular disorders are difficult to diagnose early due to the lack of a systematic assessment. Our previous work has developed a reliable experimental design and the result shows promising results that vestibular sensory input while walking could be affected through mastoid vibration (MV) and changes are in the direction of motion. In the present paper, we wanted to extend this work to older adults and investigate how manipulating sensory input through mastoid vibration (MV) could affect dynamic postural control during walking...
January 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28128226/low-level-of-swiprosin-1-efhd2-in-vestibular-nuclei-of-spontaneously-hypersensitive-motion-sickness-mice
#8
Zhi-Bin Wang, Ping Han, Ling-Chang Tong, Yi Luo, Wei-Heng Su, Xin Wei, Xu-Hong Yu, Wei-Ye Liu, Xiu-Hua Zhang, Hong Lei, Zhen-Zhen Li, Fang Wang, Jian-Guo Chen, Tong-Hui Ma, Ding-Feng Su, Ling Li
Susceptibility to motion sickness (MS) varies considerably among humans. However, the cause of such variation is unclear. Here, we used a classical genetic approach to obtain mouse strains highly sensitive and resistant to MS (SMS and RMS). Proteomics analysis revealed substantially lower swiprosin-1 expression in SMS mouse brains. Inducing MS via rotary stimulation decreased swiprosin-1 in the mouse brains. Swiprosin-1 knockout mice were much more sensitive to motion disturbance. Immunohistochemistry revealed strong swiprosin-1 expression in the vestibular nuclei (VN)...
January 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28107424/anchoring-the-self-to-the-body-in-bilateral-vestibular-failure
#9
Diane Deroualle, Michel Toupet, Christian van Nechel, Ulla Duquesne, Charlotte Hautefort, Christophe Lopez
Recent findings suggest that vestibular information plays a significant role in anchoring the self to the body. Out-of-body experiences of neurological origin are frequently associated with vestibular sensations, and galvanic vestibular stimulation in healthy participants anchors the self to the body. Here, we provide the first objective measures of anchoring the self to the body in chronic bilateral vestibular failure (BVF). We compared 23 patients with idiopathic BVF to 23 healthy participants in a series of experiments addressing several aspects of visuo-spatial perspective taking and embodiment...
2017: PloS One
https://www.readbyqxmd.com/read/28093476/muscarinic-acetylcholine-receptors-and-m-currents-underlie-efferent-mediated-slow-excitation-in-calyx-bearing-vestibular-afferents
#10
J Chris Holt, Paivi M Jordan, Anna Lysakowski, Amit Shah, Kathy Barsz, Donatella Contini
: Stimulation of vestibular efferent neurons excites calyx and dimorphic (CD) afferents. This excitation consists of fast and slow components that differ over 100-fold in activation kinetics and response duration. In turtle, efferent-mediated fast excitation arises in CD afferents when the predominant efferent neurotransmitter acetylcholine (ACh) activates calyceal nicotinic ACh receptors (nAChRs); however, it is unclear whether the accompanying efferent-mediated slow excitation is also attributed to cholinergic mechanisms...
January 16, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28061922/respiratory-and-pulse-changes-due-to-vestibular-stimulations-in-a-motion-based-simulator
#11
Savas Ilbasmis, Safak Yildiz
INTRODUCTION: One of the mechanisms leading to spatial disorientation (SD) is overstimulation of the vestibular system by various aircraft maneuvers. The objective of this study was to observe respiratory rate and pulse changes during vestibular system stimulations with the help of two selected SD training profiles. METHODS: The respiration and pulse rates of 15 subjects were recorded in response to 2 sequential SD training profiles on a motion-based simulator. The session started with a motionless instruction period (IP), continued with a Coriolis profile (CP) which stimulated the semicircular canals, and ended with a Dark Takeoff profile (DP) which stimulated the otolith organs...
January 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28054312/latent-inhibition-reduces-nocebo-nausea-even-without-deception
#12
V F Quinn, E J Livesey, B Colagiuri
BACKGROUND: Nocebo nausea is a debilitating and prevalent side effect that can develop after conditioning occurs between cues present in the treatment context and the experience of nausea. Interventions that retard conditioning may therefore be able to reduce nocebo nausea. PURPOSE: To test whether 'latent inhibition', where pre-exposing cues in the absence of an outcome retards subsequent learning about those cues, could reduce nocebo nausea in healthy adults. METHODS: We examined this possibility using a Galvanic Vestibular Stimulation (GVS) model of nausea in healthy participants, with pre-exposure to the treatment cues achieved using a placebo version of GVS...
January 4, 2017: Annals of Behavioral Medicine: a Publication of the Society of Behavioral Medicine
https://www.readbyqxmd.com/read/28050208/tonic-investigation-concept-of-cervico-vestibular-muscle-afferents
#13
Linda Josephine Dorn, Annabelle Lappat, Winfried Neuhuber, Hans Scherer, Heidi Olze, Matthias Hölzl
Introduction Interdisciplinary research has contributed greatly to an improved understanding of the vestibular system. To date, however, very little research has focused on the vestibular system's somatosensory afferents. To ensure the diagnostic quality of vestibular somatosensory afferent data, especially the extra cranial afferents, stimulation of the vestibular balance system has to be precluded. Objective Sophisticated movements require intra- and extra cranial vestibular receptors. The study's objective is to evaluate an investigation concept for cervico-vestibular afferents with respect to clinical feasibility...
January 2017: International Archives of Otorhinolaryngology
https://www.readbyqxmd.com/read/28045785/cold-thermal-irrigation-decreases-the-ipsilateral-gain-of-the-vestibulo-ocular-reflex
#14
Laszlo T Tamás, Konrad P Weber, Christopher J Bockisch, Dominik Straumann, David M Lasker, Béla Büki, Alexander A Tarnutzer
OBJECTIVES: During head rotations, neuronal firing rates increase in ipsilateral and decrease in contralateral vestibular afferents. At low accelerations, this "push-pull mechanism" is linear. At high accelerations, however, the change of firing rates is nonlinear in that the ipsilateral increase of firing rate is larger than the contralateral decrease. This mechanism of stronger ipsilateral excitation than contralateral inhibition during high-acceleration head rotation, known as Ewald's second law, is implemented within the nonlinear pathways...
December 27, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/28039372/global-analysis-of-protein-expression-of-inner-ear-hair-cells
#15
Ann E Hickox, Ann C Y Wong, Kwang Pak, Chelsee Strojny, Miguel Ramirez, John R Yates, Allen F Ryan, Jeffrey N Savas
: The mammalian inner ear subserves auditory and vestibular sensations via highly specialized cells and proteins. Sensory receptor hair cells (HCs) are necessary for transducing mechanical inputs and stimulating sensory neurons by employing a host of known and yet unknown protein machinery. To understand the protein composition of these unique post-mitotic cells, in which irreversible protein degradation or damage can lead to impaired hearing and balance, we analyzed inner ear samples by tandem mass spectrometry to generate an unbiased, shotgun-proteomics view of protein identities and abundances...
December 30, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28032141/vestibular-control-of-standing-balance-is-enhanced-with-increased-cognitive-load
#16
Michael A McGeehan, Marjorie H Woollacott, Brian H Dalton
When cognitive load is elevated during a motor task, cortical inhibition and reaction time are increased; yet, standing balance control is often unchanged. This disconnect is likely explained by compensatory mechanisms within the balance system such as increased sensitivity of the vestibulomotor pathway. This study aimed to determine the effects of increased cognitive load on the vestibular control of standing balance. Participants stood blindfolded on a force plate with their head facing left and arms relaxed at their sides for two trials while exposed to continuous electrical vestibular stimulation (EVS)...
December 28, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27974743/high-order-synchronization-of-hair-cell-bundles
#17
Michael Levy, Adrian Molzon, Jae-Hyun Lee, Ji-Wook Kim, Jinwoo Cheon, Dolores Bozovic
Auditory and vestibular hair cell bundles exhibit active mechanical oscillations at natural frequencies that are typically lower than the detection range of the corresponding end organs. We explore how these noisy nonlinear oscillators mode-lock to frequencies higher than their internal clocks. A nanomagnetic technique is used to stimulate the bundles without an imposed mechanical load. The evoked response shows regimes of high-order mode-locking. Exploring a broad range of stimulus frequencies and intensities, we observe regions of high-order synchronization, analogous to Arnold Tongues in dynamical systems literature...
December 15, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27974448/the-inion-response-revisited-evidence-for-a-possible-cerebellar-contribution-to-vestibular-evoked-potentials-produced-by-air-conducted-sound-stimulation
#18
Neil P M Todd, Sendhil Govender, James Gordon Colebatch
This study investigated the effect of eye gaze and head position on vestibular evoked potentials (VsEPs). Head position would be expected to affect myogenic sources and eye position is known to affect ocular myogenic responses (OVEMPs), whereas a neurogenic source should behave otherwise. 11 healthy subjects were recruited and VsEPs using 72 channel EEG were recorded at a fixed intensity above the vestibular threshold. Three eye gaze and three head positions were tested (-20°, 0° and+20° to the horizontal)...
December 14, 2016: Journal of Neurophysiology
https://www.readbyqxmd.com/read/27942898/assessment-of-endolymphatic-hydrops-and-otolith-function-in-patients-with-m%C3%A3-ni%C3%A3-re-s-disease
#19
Tomoko Okumura, Takao Imai, Yasumitsu Takimoto, Noriaki Takeda, Tadashi Kitahara, Atsuhiko Uno, Takefumi Kamakura, Yasuhiro Osaki, Yoshiyuki Watanabe, Hidenori Inohara
Ménière's disease is associated with hydrops of the inner ear endolymphatic space, and histopathologically, the cochlea and vestibule are usually involved. We used gadolinium-enhanced magnetic resonance imaging and measured cervical and ocular vestibular evoked myogenic potentials and the gain in the utricular induced linear vestibulo-ocular reflex to test the hypothesis that vestibular hydrops in Ménière's disease patients is associated with otolith organ dysfunction. We evaluated 21 patients diagnosed with unilateral definitive Ménière's disease using gadolinium magnetic resonance imaging to detect endolymphatic hydrops in the cochlea and vestibule...
December 10, 2016: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27869225/noisy-galvanic-vestibular-stimulation-induces-a-sustained-improvement-in-body-balance-in-elderly-adults
#20
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
keyword
keyword
103172
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"