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vestibular center of pressure

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https://www.readbyqxmd.com/read/28687471/does-the-postural-variable-affect-the-determination-of-balance-compensation-level-in-vestibular-schwannoma-patients
#1
Julien Frère, Charles P Hoffmann, Gérome C Gauchard, Cécile Parietti-Winkler
Previous sensory organization test (SOT) outcomes provided evidences that the vestibular schwannoma (VS) removal led to acute and slow changes in the ability to use vestibular cues for balance control. However, the assumptions behind the equilibrium score (ES) are somewhat controversial within the literature. Therefore, we compared the time-course of balance control in eighteen VS patients across different postural variables. Analyses of variance and unsupervised clustering (k-means) were used to compare the whole dataset of four postural variables: ES, a modified ES which factored in the time before a fall (cES), the mean amplitude (MA) and the mean velocity (MV) of center of pressure displacements...
July 4, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28419063/the-effect-of-elevated-intracranial-pressure-on-frequency-tuning-of-air-conducted-ocular-vestibular-myogenic-potentials-in-m%C3%A3-ni%C3%A3-re-s-disease-patients
#2
Rebecca Maxwell, Claudia Jerin, Robert Gürkov
OBJECTIVE: To investigate the effect of increased intracranial pressure on ocular vestibular-evoked myogenic potential (oVEMP) amplitudes and frequency tuning in patients with Ménière's disease (MD) to elucidate whether oVEMPS recorded under such conditions could provide a simple and accurate diagnostic test for MD. SETTING: Tertiary referral center for otology and neurotology. PATIENTS: Ten patients with certain unilateral MD (mean age = 48...
July 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28368883/effect-of-gaze-stabilization-exercises-on-vestibular-function-during-postural-control
#3
Akiyoshi Matsugi, Yusuke Ueta, Kosuke Oku, Kojiro Okuno, Yoshiki Tamaru, Shohei Nomura, Hiroaki Tanaka, Nobuhiko Mori
Gaze-stabilization exercise (GSE) is often conducted in vestibular rehabilitation, but its effect on vestibular function in postural control is not clear. We investigated whether GSE affects vestibular function during static upright standing and vestibulospinal reflex (VSR) in healthy young adults. First, the center of pressure of the total trajectory length (CoP-L) was measured before each GSE task or control (only standing) task (pre), immediately after (post), and 10 min after (post10) in the static standing position on foam rubber with the eyes open or closed (EC)...
May 24, 2017: Neuroreport
https://www.readbyqxmd.com/read/28351744/dynamical-analysis-of-balance-in-vestibular-schwannoma-patients
#4
Charles P Hoffmann, Benoît Seigle, Julien Frère, Cécile Parietti-Winkler
The analysis of the complexity of postural fluctuations is a recent method for assessing postural control. Complexity relates to the irregularity of the center of pressure time series and characterizes the ability of postural control to meet a changing environment. In our study, we used the sample entropy (SampEn) parameter to evaluate the complexity of postural sway velocity time series in patients with vestibular schwannoma (n=19) compared to healthy controls (n=20), using the sensory organization test. Patients performed postural assessments three days before surgical ablation of the tumor, then three times after surgery, at eight, thirty, and ninety days...
March 9, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28346894/the-romberg-ratio-in-people-with-multiple-sclerosis
#5
Alon Kalron
Postural control relies on the integration of inputs from the visual, somatosensory and vestibular systems which are frequently impaired in people with Multiple Sclerosis (PwMS). In this situation, examining the Romberg ratio can be useful. This parameter can be interpreted as a gross indicator of a vestibular and proprioceptive contribution to postural control. Therefore, the primary objective of the current study was to examine whether the Romberg ratio differs between MS fallers, non-fallers and neurological disability levels...
March 14, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28256416/the-triage-score-for-vertigo-or-dizziness-a-diagnostic-model-for-stroke-in-the-emergency-department
#6
R Kuroda, T Nakada, T Ojima, M Serizawa, N Imai, N Yagi, A Tasaki, M Aoki, T Oiwa, T Ogane, K Mochizuki, M Kobari, H Miyajima
BACKGROUND: Vertigo or dizziness is a common occurrence, but it remains a challenging symptom when encountered in the emergency department (ED). A diagnostic score for stroke with high accuracy is therefore required. METHODS: A single-center observational study (498 patients) was conducted. The predictor variables were derived from a multivariate logistic regression analysis with Akaike information criterion. The outcome was the occurrence of stroke. We evaluated the utility of a new diagnostic score (TriAGe+) and compared it with the ABCD2 score...
February 27, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28195999/clinical-significance-of-arterial-stiffness-and-metabolic-syndrome-scores-in-vestibular-neuritis
#7
Jae Ho Chung, Seung Hwan Lee, Chul Won Park, Jin Hyeok Jeong, Jeong-Hun Shin
OBJECTIVE: To investigate the clinical significance of cardiovascular factors, including arterial stiffness and metabolic syndrome scores, in the development of vestibular neuritis. STUDY DESIGN: A prospective, case-control study. SETTING: Tertiary referral center. PATIENTS: Fifty-eight adult patients with vestibular neuritis (VN) and 58 age- and sex-matched controls were evaluated between January 2015 and January 2016...
June 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28032220/transoral-endoscopic-parathyroidectomy-vestibular-approach-a-novel-scarless-parathyroid-surgery
#8
Thanyawat Sasanakietkul, Pornpeera Jitpratoom, Angkoon Anuwong
BACKGROUND: Natural orifice transluminal endoscopic surgery developed for neck surgery become increasing popular. Herein, an innovative transoral endoscopic parathyroidectomy vestibular approach (TOEPVA) was developed for primary hyperparathyroidism (PHPT) and renal hyperparathyroidism (rHPT). METHODS: Incisions were made at the oral vestibule under the inferior lip. A 10-mm trocar was inserted through the center of the oral vestibule with two 5-mm trocars laterally...
December 28, 2016: Surgical Endoscopy
https://www.readbyqxmd.com/read/28032141/vestibular-control-of-standing-balance-is-enhanced-with-increased-cognitive-load
#9
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)...
April 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27812748/relationship-between-changes-in-vestibular-sensory-reweighting-and-postural-control-complexity
#10
Brian L Cone, Daniel J Goble, Christopher K Rhea
Complexity measures have become increasingly prominent in the postural control literature. Several studies have found associations between clinical balance improvements and complexity, but the relationship between sensory reweighting and complexity changes has remained unobserved. The purpose of this study was to determine the relationship between sensory reweighting via Wii Fit balance training and complexity. Twenty healthy adults completed 6 weeks of training. Participants completed the sensory organization test (SOT) before and after the sessions...
November 3, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27749751/unilateral-hearing-loss-is-associated-with-impaired-balance-in-children-a-pilot-study
#11
Nikolaus E Wolter, Sharon L Cushing, Luis D Vilchez-Madrigal, Adrian L James, Jennifer Campos, Blake C Papsin, Karen A Gordon
OBJECTIVE: To determine if children with unilateral sensorineural hearing loss (UHL) demonstrate impaired balance compared with their normal hearing (NH) peers. STUDY DESIGN: Prospective, case-control study. METHODS: Balance was assessed in14 UHL and 14 NH children using the Bruininks-Oseretsky Test-2 (BOT-2) and time to fall (TTF) in an immersive, virtual-reality laboratory. Postural control was quantified by center of pressure (COP) using force plates...
December 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27642667/two-common-second-causes-of-dizziness-in-patients-with-m%C3%A3-ni%C3%A3-re-s-disease
#12
Babette F van Esch, Peter Paul G van Benthem, Hester J van der Zaag-Loonen, Tjasse D Bruintjes
OBJECTIVE: There are no epidemiological studies quantifying the prevalence of second causes of dizziness in Ménière's disease (MD). Therefore, we aimed to quantify which dizziness-inducing causes are prevalent alongside MD. Moreover, we analyzed which second cause of dizziness was more common in a specific age group and if age was a risk factor. STUDY DESIGN: Retrospective cohort study. SETTING: Tertiary referral center. METHODS: Data were retrospectively obtained from all MD patients who visited our clinic between January 2000 and December 2013...
December 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27379198/static-balance-in-patients-with-vestibular-impairments-a-preliminary-study
#13
Hossein Talebi, Mohammad Taghi Karimi, Seyed Hamid Reza Abtahi, Niloofar Fereshtenejad
Aims. Vestibular system is indicated as one of the most important sensors responsible for static and dynamic postural control. In this study, we evaluated static balance in patients with unilateral vestibular impairments. Materials and Methods. We compared static balance control using Kistler force plate platform between 10 patients with unilateral vestibular impairments and 20 normal counterparts in the same sex ratio and age limits (50 ± 7). We evaluated excursion and velocity of center of pressure (COP) and path length in anteroposterior (AP) and mediolateral (ML) planes with eyes open and with eyes closed...
2016: Scientifica
https://www.readbyqxmd.com/read/27355830/postural-stability-of-patients-with-schizophrenia-during-challenging-sensory-conditions-implication-of-sensory-integration-for-postural-control
#14
Ya-Ling Teng, Chiung-Ling Chen, Shu-Zon Lou, Wei-Tsan Wang, Jui-Yen Wu, Hui-Ing Ma, Vincent Chin-Hung Chen
Postural dysfunctions are prevalent in patients with schizophrenia and affect their daily life and ability to work. In addition, sensory functions and sensory integration that are crucial for postural control are also compromised. This study intended to examine how patients with schizophrenia coordinate multiple sensory systems to maintain postural stability in dynamic sensory conditions. Twenty-nine patients with schizophrenia and 32 control subjects were recruited. Postural stability of the participants was examined in six sensory conditions of different level of congruency of multiple sensory information, which was based on combinations of correct, removed, or conflicting sensory inputs from visual, somatosensory, and vestibular systems...
2016: PloS One
https://www.readbyqxmd.com/read/27169000/the-influence-of-scopolamine-on-motor-control-and-attentional-processes
#15
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/26864309/task-specific-balance-training-improves-the-sensory-organisation-of-balance-control-in-children-with-developmental-coordination-disorder-a-randomised-controlled-trial
#16
RANDOMIZED CONTROLLED TRIAL
Shirley S M Fong, X Guo, Karen P Y Liu, W Y Ki, Lobo H T Louie, Raymond C K Chung, Duncan J Macfarlane
Sensory organisation of balance control is compromised in children with developmental coordination disorder (DCD). A randomised controlled trial involving 88 children with DCD was conducted to evaluate the efficacy of a task-specific balance training (functional-movement training, FMT) programme in improving balance deficits in a DCD population. The DCD participants were randomly assigned to either a FMT group or a control group. The FMT group received two training sessions/ week for 3 months. Measurements of the participants' sensory organisation (somatosensory, vestibular and visual ratios), balance and motor proficiency (Movement Assessment Battery for Children, MABC scores) and center of pressure sway velocity (Unilateral Stance Test, UST scores) were taken at baseline, immediately after FMT and 3 months after FMT...
February 11, 2016: Scientific Reports
https://www.readbyqxmd.com/read/26834626/age-related-changes-in-dynamic-postural-control-and-attentional-demands-are-minimally-affected-by-local-muscle-fatigue
#17
Anthony Remaud, Cécile Thuong-Cong, Martin Bilodeau
Normal aging results in alterations in the visual, vestibular and somtaosensory systems, which in turn modify the control of balance. Muscle fatigue may exacerbate these age-related changes in sensory and motor functions, and also increase the attentional demands associated with dynamic postural control. The purpose of this study was to investigate the effect of aging on dynamic postural control and posture-related attentional demands before and after a plantar flexor fatigue protocol. Participants (young adults: n = 15; healthy seniors: n = 13) performed a dynamic postural task along the antero-posterior (AP) and the medio-lateral (ML) axes, with and without the addition of a simple reaction time (RT) task...
2015: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/26666775/benign-paroxysmal-positional-vertigo-commonly-occurs-following-repair-of-superior-canal-dehiscence
#18
Samuel R Barber, Yew Song Cheng, Maryanna Owoc, Brian M Lin, Aaron K Remenschneider, Elliott D Kozin, Daniel J Lee
OBJECTIVES/HYPOTHESIS: Repair of superior canal dehiscence (SCD) often results in the resolution of preoperative auditory and vestibular symptoms; however, many patients experience dizziness in the postoperative period. Postoperative dizziness may be the result of new-onset benign paroxysmal positional vertigo (BPPV). This study aims to investigate the prevalence of BPPV before and following SCD repair. STUDY DESIGN: Retrospective chart review at a tertiary care center...
September 2016: Laryngoscope
https://www.readbyqxmd.com/read/26402476/young-adults-largely-depend-on-vision-for-postural-control-when-standing-on-a-bosu-ball-but-not-on-foam
#19
COMPARATIVE STUDY
Anat Lubetzky-Vilnai, Sarah W McCoy, Robert Price, Marcia A Ciol
What happens at the sensory level when a person is balancing on compliant surfaces? Compliant surfaces such as both-sides-up (BOSU) balls are often used as a form of "proprioceptive exercises." Clinical theories in neurorehabilitation suggest that compliant surfaces disrupt the somatosensory contribution to balance and increase reliance on vision and vestibular input. Understanding the sensory aspects of compliant surfaces' exercises would have important implications for balance training of athletes and of people with somatosensory deficits such as people with recurrent ankle sprains...
October 2015: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/26287266/spatial-and-temporal-analyses-of-posture-in-strabismic-children
#20
REVIEW
Marie-Désirée Ezane, Cynthia Lions, Emmanuel Bui Quoc, Chantal Milleret, Maria Pia Bucci
PURPOSE: To analyse postural performances of strabismic children, both in the spatial and the temporal domains, by wavelet transformation, comparing both stable and unstable situations. METHODS: Twenty-six strabismic children aged from 4 to 11 years old and 26 age-matched normal children participated in the study. Postural performances were evaluated using the Framiral® platform. Posture was recorded in the following conditions: eyes open fixating a target and eyes closed on stable and unstable platforms...
October 2015: Graefe's Archive for Clinical and Experimental Ophthalmology
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