keyword
MENU ▼
Read by QxMD icon Read
search

vestibular information

keyword
https://www.readbyqxmd.com/read/28819687/central-not-peripheral-vestibular-processing-impairs-gait-coordination
#1
Yoav Gimmon, Jennifer Millar, Rebecca Pak, Elizabeth Liu, Michael C Schubert
Gait coordination is generated by neuronal inter-connections between central pattern generators in the spinal cord governed by cortical areas. Malfunction of central vestibular processing areas generates vestibular symptoms in the absence of an identifiable peripheral vestibular system lesion. Walking in the dark enforces a coordinated afference primarily from the vestibular and somatosensory systems. We hypothesized that patients with aberrant central vestibular processing would demonstrate unique gait characteristics, and have impaired gait coordination compared with those patients with abnormal peripheral vestibular function and healthy controls...
August 17, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28814635/perception-of-the-dynamic-visual-vertical-during-sinusoidal-linear-motion
#2
Antonella Pomante, Luc P J Selen, W Pieter Medendorp
The vestibular system provides information for spatial orientation. However, this information is ambiguous: because the otoliths sense the gravito-inertial force, they cannot distinguish gravitational and inertial components. As a consequence, prolonged linear acceleration of the head can be interpreted as tilt, referred to as the somatogravic effect. Previous modeling work suggests that the brain disambiguates the otolith signal according to the rules of Bayesian inference, combining noisy canal cues with the a priori assumption that prolonged linear accelerations are unlikely...
August 16, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28813962/a-fundamental-study-on-how-holding-a-helium-filled-balloon-affects-stability-in-human-standing
#3
Keisuke Shima, Koji Shimatani, Gen Sato, Mami Sakata, Psiche Giannoni, Pietro Morasso
Various studies have been conducted in the field of the development/deterioration of standing and walking ability. In standing and walking control strategy, the relationship linking visual/somatosensory/vestibular-system information and physical movement is important. Researchers have previously sought to evaluate attitude control based on human sensory information. The authors have also reported that the body sway of a walking infant is mitigated when the subject holds a helium-filled balloon, with results suggesting that this approach can be applied to extend walking distance...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28802368/study-of-the-effects-of-hearing-on-static-and-dynamic-postural-function-in-children-using-cochlear-implants
#4
Malihah Mazaheryazdi, Abdollah Moossavi, Javad Sarrafzadah, Saeed Talebian, Shohreh Jalaie
OBJECTIVE: The present study aimed to evaluate the postural control perturbations by the center of pressure parameters in two main approaches, cochlear implant turned "on" and "off". METHODS: We included 25 children aged 8-10 years with unilateral cochlear implants and bilateral vestibular hypofunction deficit. To evaluate the postural function, each children was asked to stand on the force plate under 3 different conditions and cochlear implant turned "on" and "off": Condition (A) double stance from open eyes to closed eyes, Condition (B) double stance with open eyes engaging in the dual task and Condition (C) From double leg stance to one leg stance with open eyes for assessment of dynamic postural control...
September 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28795618/distribution-of-dental-plaque-and-gingivitis-within-the-dental-arches
#5
Prem K Sreenivasan, Kakarla V V Prasad
Objective The natural accumulation of supragingival plaque on surfaces of human teeth is associated with gingival inflammation and the initiation of common oral diseases. This study evaluated the distribution of dental plaque and gingivitis scores within the dental arches after prophylaxis. Methods Adult subjects from the Dharwad, India area representing the general population who provided written informed consent were scheduled for screening. Healthy subjects over the age of 18 years, not currently requiring any medical or dental care, and presenting with a complement of at least 20 natural teeth were recruited for this parallel design study...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28794847/neuro-otological-and-peripheral-nerve-involvement-in-fabry-disease
#6
Sergio Carmona, Romina Weinschelbaum, Ana Pardal, Cintia Marchesoni, Paz Zuberbuhler, Patricia Acosta, Guillermo Cáceres, Isaac Kisinovsky, Luciana Bayón, Ricardo Reisin
Fabry disease (FD) is an X-linked lysosomal storage disease, with multisystemic glycosphingolipids deposits. Neuro-otological involvement leading to hearing loss and vestibular dysfunctions has been described, but there is limited information about the frequency, site of lesion, or the relationship with peripheral neuropathy. The aim was to evaluate the presence of auditory and vestibular symptoms, and assess neurophysiological involvement of the VIII cranial nerve, correlating these findings with clinical and neurophysiological features of peripheral neuropathy...
July 18, 2017: Audiology Research
https://www.readbyqxmd.com/read/28783491/adaptation-of-postural-recovery-responses-to-a-vestibular-sensory-illusion-in-individuals-with-parkinson-disease-and-healthy-controls
#7
Mark E Lester, James T Cavanaugh, K Bo Foreman, Scott W Shaffer, Robin Marcus, Leland E Dibble
BACKGROUND: The ability to adapt postural responses to sensory illusions diminishes with age and is further impaired by Parkinson disease. However, limited information exists regarding training-related adaptions of sensory reweighting in these populations. METHODS: This study sought to determine whether Parkinson disease or age would differentially affect acute postural recovery or adaptive postural responses to novel or repeated exposure to sensory illusions using galvanic vestibular stimulation during quiet stance...
July 26, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28754643/probabilistic-tractography-of-the-cranial-nerves-in-vestibular-schwannoma
#8
Amir Zolal, Tareq A Juratli, Dino Podlesek, Bernhard Rieger, Hagen H Kitzler, Jennifer Linn, Gabriele Schackert, Stephan B Sobottka
OBJECTIVE: Multiple recent studies have reported on diffusion tensor-based fiber tracking of cranial nerves in vestibular schwannoma, with conflicting results as to the accuracy of the method and the occurrence of cochlear nerve depiction. Probabilistic non-tensor based tractography might offer advantages in terms of better extraction of directional information from the underlying data in cranial nerves, which are of sub-voxel size. METHODS: Twenty-one patients with large vestibular schwannomas were recruited...
July 25, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28716764/influence-of-time-and-direction-information-on-video-head-impulse-gains
#9
Oğuz Yılmaz, Ersoy Öz, Serkan Kurt, Öyküm Esra Aşkın, Elifnur Taşdemir, Berna Özge Mutlu, Ahmet Keleş, Raşit Cevizci
OBJECTIVE: The objective of this study was to establish which factor leads to a higher vestibulo-ocular reflex (VOR) gain: the timing of the movement or the direction of the movement. For this purpose, healthy volunteers were examined under three conditions: (1) when they were informed about the timing of the head movement; (2) when they were informed about the direction of the head movement; and (3) when they knew both the timing and the direction of the head movement. MATERIALS AND METHODS: This study included data from 19 participants between the ages of 20 and 23 years with no neurological or vestibular ailments...
July 17, 2017: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/28711896/computer-tomographic-characteristics-of-root-length-incisors-and-canines-of-the-upper-and-lower-jaws-in-boys-and-girls-with-different-craniotypes-and-physiological-bite
#10
Аlla V Маrchenko, Іgor V Gunas, Tetyana O Petrushanko, Oksana А Serebrennikova, Yulia Yu Trofimenko
INTRODUCTION: In recent years, in world literature appeared research, which focuses on the study of relationships craniotypes with odonto-metric indicators, size, shape of the dental arches and occlusion. However, most of the experts focus on the study of individual features of the structure of the teeth-jaw system in people with different types of faces and aspects of sexual dimorphism and ethnic characteristics. Studies containing information about cranio-typological variability of the roots of teeth we did not encounter...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28686375/-vestibular-and-visual-stimulation-simultaneous-perception-or-not
#11
Jelena Todic, Jean-Philippe Guyot, Angelica Perez Fornos, Samuel Cavuscens, Maurizio Ranieri, Daniel Merfeld, Richard Lewis, Nils Guinand
The human brain is able to consider that two sensory stimuli are synchronous while they activate the cortex with some delay because they follow different neurological pathways. This process is only possible if the time interval between the two stimuli does not exceed a certain limit, called "Temporal Binding Window" (TBW). Studies of this parameter, involving the vestibular perception, are difficult because subjects must be moved, which generates parasitic proprioceptive information. By cons, in patients equipped with a vestibular implant, it is possible to generate a vestibular perception selectively by electrical stimulation of the vestibular nerve...
October 5, 2016: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28676739/pid-controller-design-for-fes-applied-to-ankle-muscles-in-neuroprosthesis-for-standing-balance
#12
Hossein Rouhani, Michael Same, Kei Masani, Ya Qi Li, Milos R Popovic
Closed-loop controlled functional electrical stimulation (FES) applied to the lower limb muscles can be used as a neuroprosthesis for standing balance in neurologically impaired individuals. The objective of this study was to propose a methodology for designing a proportional-integral-derivative (PID) controller for FES applied to the ankle muscles toward maintaining standing balance for several minutes and in the presence of perturbations. First, a model of the physiological control strategy for standing balance was developed...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28665390/-surgical-treatment-of-acoustic-neuromas-vestibular-schwannomas
#13
V N Shimanskiy, S V Tanyashin, K V Shevchenko, D A Odamanov
Clinical guidelines are topical systematically developed provisions designed to help the doctor make a decision about a treatment approach in certain clinical situations; they provide information on conducting diagnostic and screening tests, the amount of medical and surgical care, and other aspects of clinical practice. Vestibular schwannomas account for 8% of all intracranial lesions, up to 30% of posterior cranial fossa tumors, and 85% of cerebellopontine angle tumors. The incidence rate of acoustic neuromas is approximately 1 case per 100000 population per year...
2017: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/28642694/ehlers-danlos-syndrome-hypermobility-type-impact-of-somatosensory-orthoses-on-postural-control-a-pilot-study
#14
Emma G Dupuy, Pascale Leconte, Elodie Vlamynck, Audrey Sultan, Christophe Chesneau, Pierre Denise, Stéphane Besnard, Boris Bienvenu, Leslie M Decker
Elhers-Danlos syndrome (EDS) is the clinical manifestation of connective tissue disorders, and comprises several clinical forms with no specific symptoms and selective medical examinations which result in a delay in diagnosis of about 10 years. The EDS hypermobility type (hEDS) is characterized by generalized joint hypermobility, variable skin hyperextensibility and impaired proprioception. Since somatosensory processing and multisensory integration are crucial for both perception and action, we put forth the hypothesis that somatosensory deficits in hEDS patients may lead, among other clinical symptoms, to misperception of verticality and postural instability...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28642583/sox2-is-required-for-inner-ear-neurogenesis
#15
Aleta R Steevens, Danielle L Sookiasian, Jenna C Glatzer, Amy E Kiernan
Neurons of the cochleovestibular ganglion (CVG) transmit hearing and balance information to the brain. During development, a select population of early otic progenitors express NEUROG1, delaminate from the otocyst, and coalesce to form the neurons that innervate all inner ear sensory regions. At present, the selection process that determines which otic progenitors activate NEUROG1 and adopt a neuroblast fate is incompletely understood. The transcription factor SOX2 has been implicated in otic neurogenesis, but its requirement in the specification of the CVG neurons has not been established...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28623107/speech-in-noise-perception-in-unilateral-hearing-loss-relation-to-pure-tone-thresholds-and-brainstem-plasticity
#16
Nicolas Vannson, Chris J James, Bernard Fraysse, Boris Lescure, Kuzma Strelnikov, Olivier Deguine, Pascal Barone, Mathieu Marx
We investigated speech recognition in noise in subjects with mild to profound levels of unilateral hearing loss. Thirty-five adults were evaluated using an adaptive signal-to-noise ratio (SNR50) sentence recognition threshold test in three spatial configurations. The results revealed a significant correlation between pure-tone average audiometric thresholds in the poorer ear and SNR thresholds in the two conditions where speech and noise were spatially separated: dichotic - with speech presented to the poorer ear and reverse dichotic - with speech presented to the better ear...
June 13, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28608779/cerebellar-re-encoding-of-self-generated-head-movements
#17
Guillaume P Dugué, Matthieu Tihy, Boris Gourévitch, Clément Léna
Head movements are primarily sensed in a reference frame tied to the head, yet they are used to calculate self-orientation relative to the world. This requires to re-encode head kinematic signals into a reference frame anchored to earth-centered landmarks such as gravity, through computations whose neuronal substrate remains to be determined. Here, we studied the encoding of self-generated head movements in the rat caudal cerebellar vermis, an area essential for graviceptive functions. We found that, contrarily to peripheral vestibular inputs, most Purkinje cells exhibited a mixed sensitivity to head rotational and gravitational information and were differentially modulated by active and passive movements...
June 13, 2017: ELife
https://www.readbyqxmd.com/read/28593438/eye-movements-are-correctly-timed-during-walking-despite-bilateral-vestibular-hypofunction
#18
Eric R Anson, Tim Kiemel, John P Carey, John J Jeka
Individuals with bilateral vestibular hypofunction (BVH) often report symptoms of oscillopsia (the perception that the world is bouncing or unstable) during walking. Efference copy/proprioception contributes to locomotion gaze stability in animals, sometimes inhibiting the vestibulo-ocular reflex (VOR). Gaze stability requires both adequate eye velocity and appropriate timing of eye movements. It is unknown whether eye velocity (VOR gain), timing (phase), or both are impaired for individuals with BVH during walking...
August 2017: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/28570419/ultra-high-field-9-4-t-mri-analysis-of-contrast-agent-transport-across-the-blood-perilymph-barrier-and-intrastrial-fluid-blood-barrier-in-the-mouse-inner-ear
#19
S Allen Counter, Sahar Nikkhou-Aski, Peter Damberg, Cecilia Engmér Berglin, Göran Laurell
HYPOTHESIS: Effective paramagnetic contrast agent for the penetration of the perilymphatic spaces of the scala tympani, scala vestibuli, and scala media of the mouse inner ear can be determined using intravenous injection of various gadolinium (Gd) complexes and ultra-high-field magnetic resonance imaging (MRI) at 9.4 Tesla. BACKGROUND: A number of contrast agents have been explored in experimental high-field MRI to determine the most effective Gd complex for ideal signal-to-noise ratio and maximal visualization of the in vivo mammalian inner ear in analyzing the temporal and spatial parameters involved in drug penetration of the blood-perilymph barrier and intrastrial fluid-blood barrier in the mouse model using MRI...
August 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28549682/epidemiology-of-vestibular-disorders-in-the-otoneurology-unit
#20
Gloria Guerra-Jiménez, Alejandra Arenas Rodríguez, Juan Carlos Falcón González, Daniel Pérez Plasencia, Ángel Ramos Macías
INTRODUCTION AND OBJECTIVES: The set of symptoms relating to disorders of the balance system are common in the general population. However, there are few studies quantifying the frequency of onset of the various vestibular disorders that present in specialist otoneurology units in the Spanish population. The aim of this study is to establish the epidemiology of vestibular disorders, their form of presentation, and the expected care burden in a specialist otoneurology clinic. MATERIAL AND METHODS: A retrospective, descriptive, observational study of patients referred to the otoneurology unit of a third level hospital between 1/1/2015 and 31/12/2015...
May 23, 2017: Acta Otorrinolaringológica Española
keyword
keyword
103171
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"