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Vestibular System

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https://www.readbyqxmd.com/read/28742631/vestibular-function-in-adults-with-epilepsy-of-unknown-etiology
#1
Sherifa A Hamed, Amal M Tohamy, Amira M Oseilly
OBJECTIVE: This study aimed to evaluate vestibular function in adults with chronic epilepsy of unknown etiology in the inter-ictal period. BACKGROUND: Epilepsy is a chronic medical disorder. Life-long therapy may be required in one-third of patients. Epilepsy is associated with comorbid somatic conditions which impairs patients' quality of life. METHODS: This cross-sectional study included 28 with generalized tonic clonic (GTC) convulsions and 14 and 3 with temporal (TLE) and frontal lobe (FLE) epilepsies with secondary generalization (all were on regular carbamazepine therapy) and 40 healthy control subjects...
July 24, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28739612/benign-paroxysmal-positional-vertigo-bppv-diagnosis-and-treatment-in-an-elite-professional-football-soccer-player
#2
Lisa Burrows, Rob Price
A 33-year-old male professional football player suffered from acute-onset dizziness following a lower limb soft tissue treatment in prone lying. Symptoms included spinning vertigo lasting for 30's, headache, visual vertigo and disorientation. Clinical examination of balance and vestibular systems confirmed a left posterior canalithiasis benign paroxysmal positional vertigo (BPPV) and excluded other central and peripheral causes of dizziness. Two cycles of a left Epley manoeuvre were performed. An Epley manoeuvre abolished the BPPV and negated the need for medication...
July 24, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28737283/prevalence-of-hearing-and-vestibular-loss-in-cystic-fibrosis-patients-exposed-to-aminoglycosides
#3
Jaynee A Handelsman, Samya Z Nasr, Crystal Pitts, William M King
AIM: Cystic Fibrosis (CF) patients frequently use aminoglycosides (AGS) to treat CF exacerbation due to colonization with Pseudomonas aeruginosa. Although AGS can cause vestibular and auditory sensory losses that can negatively impact quality of life, little is known about the prevalence of vestibular loss in this population. The aim of this study was to determine the prevalence of hearing loss and/or vestibular dysfunction in CF patients treated with AGS. METHODS: The relationship between hearing status and vestibular status was also investigated...
July 24, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28734938/hepatitis-e-virus-infection-and-acute-non-traumatic-neurological-injury-a-prospective-multicentre-study
#4
Harry R Dalton, Jeroen J J van Eijk, Pascal Cintas, Richie G Madden, Catherine Jones, Glynn W Webb, Benjamin Norton, Julie Pique, Suzanne Lutgens, Nikki Devooght-Johnson, Kathy Woolson, John Baker, Maria Saunders, Liz Househam, James Griffiths, Florence Abravanel, Jacques Izopet, Nassim Kamar, Nens van Alfen, Baziel G M van Engelen, Jeremy G Hunter, Annemiek A van der Eijk, Richard P Bendall, Brendan N Mclean, Bart C Jacobs
BACKGROUND AND AIMS: HEV has been associated with a number of neurological syndromes, but causality has not yet been established. AIM: to explore the relationship between HEV and neurological illness by prospective HEV-testing of patients presenting with acute non-traumatic neurological injury. METHODS: 464 consecutive patients presenting to hospital with acute non-traumatic neurological illnesses were tested for HEV by serology and PCR from 4 centres in the UK, France and the Netherlands...
July 19, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28726311/gaba-histamine-and-fmrfamide-immunoreactivity-in-the-visual-vestibular-and-central-nervous-systems-of-hermissenda-crassicornis
#5
Marissa P Webber, James W S Thomson, Johnny Buckland-Nicks, Roger P Croll, Russell C Wyeth
Hermissenda crassicornis is a model for studying the molecular and cellular basis for classical conditioning, based on its ability to associate light with vestibular stimulation. We used confocal microscopy to map histamine, FMRF-amide, and GABA immunoreactivity in the central nervous system (CNS), eyes, optic ganglia and statocysts of the nudibranchs. For histamine immunoreactivity, we documented both consistently and variably labelled CNS structures across individuals. We also noted minor differences in GABA immunoreactivity in the CNS compared to previous work on Hermissenda...
July 20, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28722821/sensory-strategies-of-postural-sway-during-quiet-stance-in-patients-with-haemophilic-arthropathy
#6
C Cruz-Montecinos, C De la Fuente, G Rivera-Lillo, S Morales-Castillo, V Soto-Arellano, F Querol, S Pérez-Alenda
INTRODUCTION: The sensory strategies of postural control in adult haemophilic arthropathy patients are still poorly understood. AIM: To determine sensorial posture-control strategies through postural sway frequency analysis when in a bipedal quiet stance with and without visual stimulus deprivation in healthy subjects and patients with haemophilic arthropathy. Secondarily, to determine the irregularity of postural balance control through sample entropy (SampEn)...
July 19, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28720898/balance-training-improves-memory-and-spatial-cognition-in-healthy-adults
#7
Ann-Kathrin Rogge, Brigitte Röder, Astrid Zech, Volker Nagel, Karsten Hollander, Klaus-Michael Braumann, Kirsten Hötting
Physical exercise has been shown to improve cognitive functions. However, it is still unknown which type of exercise affects cognition. In the present study, we tested the hypothesis that a demanding balance training program improves memory and spatial cognition. Forty healthy participants aged 19-65 years were randomly assigned to either a balance or relaxation training intervention. Each group exercised twice a week for a total of 12 weeks. Pre- and posttests assessed balance performance, cardiorespiratory fitness, memory, spatial cognition, and executive functions...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28719825/degeneration-of-the-vestibular-nerve-in-unilateral-meniere-s-disease-evaluated-by-galvanic-vestibular-evoked-myogenic-potentials
#8
Chih-Ming Chang, Yi-Ho Young, Fu-Shan Jaw, Chi-Te Wang, Po-Wen Cheng
OBJECTIVE: The staging system of Meniere's disease utilizes audiograms to probe cochlear dysfunction. We explored the addition of galvanic vestibular-evoked myogenic potentials (VEMP) to further explore vestibular function. METHODS: Seventy patients with unilateral Meniere's disease were enrolled in this study. Within 2weeks of diagnosis, all subjects underwent pure tone audiometry, cervical and ocular VEMP, and caloric test. The prevalence of abnormal tests and the VEMP characteristic parameters such as latencies and amplitudes were analyzed...
June 19, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28716765/sporadic-endolymphatic-sac-tumor-a-very-rare-cause-of-hearing-loss-tinnitus-and-dizziness
#9
Didde Trærup Schnack, Katalin Kiss, Søren Hansen, Hidemi Miyazaki, Birgitte Bech, Per Caye Thomasen
Sporadic endolymphatic sac tumor is a very rare neoplasm. It is low malignant, locally destructive and expansive, but non-metastasizing. The tumor is very rare in the sporadic form, but more often associated with Von Hippel-Lindau disease. A 65-year old man with left sided tinnitus and hearing loss for several months. Audiometry showed an asymmetrical sensory neural hearing loss on the left side up to 60 dB. The speech discrimination score was 46% and stapedial reflexes were absent. Several years earlier, he had suffered from periods of dizziness...
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/28688530/japanese-standard-for-clinical-stabilometry-assessment-current-status-and-future-directions
#11
REVIEW
Masahiko Yamamoto, Kazuo Ishikawa, Mitsuhiro Aoki, Keisuke Mizuta, Yatsuji Ito, Masatsugu Asai, Hideo Shojaku, Toshiaki Yamanaka, Chisato Fujimoto, Toshihisa Murofushi, Tomoe Yoshida
Stabilometry is a useful tool for examining patients with functional disorders of the vestibular system. However, measurement techniques and devices vary by country. Therefore, international standardization of stabilometry is mandatory to validate the exchange of important findings. This was advocated at the 1983 Posturography Meeting in Kyoto but has not been adopted worldwide, and each country has continued to use unique regional measurement methods. In Japan, stabilometry has widespread application in medical practice in conjunction with research into its applications...
July 5, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28687325/velocity-perception-in-a-moving-observer
#12
Hinze Hogendoorn, David Alais, Hamish MacDougall, Frans A J Verstraten
Previous research has shown that when a moving stimulus is presented to a moving observer, the perceived speed of the stimulus is affected by vestibular self-motion signals (Hogendoorn, Verstraten, MacDougall, & Alais, 2017. Vision Research 130, 22-30.). This interaction was interpreted as a weighted sum of visual and vestibular motion signals. This interpretation also predicts effects of vestibular self-motion signals on perceived speed. Here, we test this prediction in two experiments. In Experiment 1, moving observers carried out a visual speed discrimination task in order to establish points of subjective equality (PSE) between stimuli presented in the same or opposite direction of self-motion...
July 20, 2017: Vision Research
https://www.readbyqxmd.com/read/28686374/-spatial-navigation-brief-overview-of-the-medicine-and-physiology-nobel-prize-2014
#13
Franciscus Boselie, Jean-Philippe Guyot
Various cells of the thalamus, hippocampus, and the medial entorhinal cortex plays a crucial role in spatial navigation ability. The highlighting of these cells and the understanding of their functioning by John O'Keefe, May-Britt and Edvard Moser have earned them the Nobel Prize for Medicine and Physiology in 2014. The vision, olfaction, and the vestibular system contribute to this complex system. These observations may well explain why patients with vestibular disorder complain of spatial disorientation, often a source of deep anxiety...
October 5, 2016: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28676068/correlation-between-delivered-radiation-doses-to-the-brainstem-or-vestibular-organ-and-nausea-vomiting-toxicity-in-patients-with-head-and-neck-cancers-an-observational-clinical-trial
#14
Kilian Schiller, Hanno Martin Specht, Bernhard Haller, Daniela Hallqvist, Michal Devecka, Aaron Becker von Rose, Stephanie Elisabeth Combs, Steffi Pigorsch
OBJECTIVE: Today intensity modulated radiation therapy (IMRT) can be considered the standard of care in patients with head and neck tumors. IMRT treatment plans are proven to reduce acute treatment related side effects by optimal sparing of organs at risk (OAR). At the same time, areas that were out of the former 3D fields now receive low radiation doses. Amongst those areas the brainstem (BS) and the vestibular system (VS) are known to be physiologically connected to nausea and vomiting (NV)...
July 4, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28676057/prevalence-of-neurological-disorders-in-french-bulldog-a-retrospective-study-of-343-cases-2002-2016
#15
Vincent Mayousse, Loïc Desquilbet, Aurélien Jeandel, Stéphane Blot
BACKGROUND: French Bulldog (FB) has significantly gained in popularity over the last few years, and seems to be frequently affected by various neurological conditions. The purpose of this retrospective study was to report the prevalences of neurological diseases in a large population of FB, presented with neurological signs between 2002 and 2016, and for which a definitive diagnosis was established. A secondary objective was to identify epidemiological characteristics regarding specific diseases in this singular breed...
July 5, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28653555/usher-s-syndrome-type-ii-a-comparative-study-of-genetic-mutations-and-vestibular-system-evaluation
#16
Giuseppe Magliulo, Giannicola Iannella, Silvia Gagliardi, Nicola Iozzo, Rocco Plateroti, Alessandro Mariottini, Francesca Torricelli
Objective Usher's syndrome type II (USH2) is characterized by moderate to profound congenital hearing loss, later onset of retinitis pigmentosa, and normal vestibular function. Recently, a study investigating the vestibular function of USH2 patients demonstrated a pathologic response to vestibular tests. In this cross-sectional study we performed vestibular tests of a group patients with genetic diagnosis of USH2 syndrome to demonstrate if vestibular damage is present in USH2 patients. Study Design Cross-sectional study...
June 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28653338/a-method-for-detailed-movement-pattern-analysis-of-tadpole-startle-response
#17
Kasra Zarei, Karen L Elliott, Sanam Zarei, Bernd Fritzsch, James H J Buchholz
Prolonged space flight, specifically microgravity, presents a problem for space exploration. Animal models with altered connections of the vestibular ear, and thus altered gravity sensation, would allow the examination of the effects of microgravity and how various countermeasures can establish normal function. We describe an experimental apparatus to monitor the effects of ear manipulations to generate asymmetric gravity input on the tadpole escape response. To perform the movement pattern analysis, an imaging apparatus was developed that uses a high-speed camera to obtain time-resolved, high-resolution images of tadpole movements...
June 27, 2017: Journal of the Experimental Analysis of Behavior
https://www.readbyqxmd.com/read/28650850/systemic-aminoglycosides-induced-vestibulotoxicity-in-humans
#18
Ruth Van Hecke, Vincent Van Rompaey, Floris L Wuyts, Laura Leyssens, Leen Maes
OBJECTIVES: This systematic review aimed to investigate the prevalence and characteristics of vestibular adverse effects of aminoglycoside (AG) therapy in humans and to analyze objective vestibular tests for the detection of AG-induced vestibulotoxicity. DESIGN: PubMed, Cochrane Database, Web of Science, and reference lists of all included studies were screened by two independent researchers. The Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines were followed...
June 23, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28649624/spaceflight-induced-neuroplasticity-in-humans-as-measured-by-mri-what-do-we-know-so-far
#19
Angelique Van Ombergen, Steven Laureys, Stefan Sunaert, Elena Tomilovskaya, Paul M Parizel, Floris L Wuyts
Space travel poses an enormous challenge on the human body; microgravity, ionizing radiation, absence of circadian rhythm, confinement and isolation are just some of the features associated with it. Obviously, all of the latter can have an impact on human physiology and even induce detrimental changes. Some organ systems have been studied thoroughly under space conditions, however, not much is known on the functional and morphological effects of spaceflight on the human central nervous system. Previous studies have already shown that central nervous system changes occur during and after spaceflight in the form of neurovestibular problems, alterations in cognitive function and sensory perception, cephalic fluid shifts and psychological disturbances...
2017: NPJ Microgravity
https://www.readbyqxmd.com/read/28649224/the-video-head-impulse-test
#20
REVIEW
G M Halmagyi, Luke Chen, Hamish G MacDougall, Konrad P Weber, Leigh A McGarvie, Ian S Curthoys
In 1988, we introduced impulsive testing of semicircular canal (SCC) function measured with scleral search coils and showed that it could accurately and reliably detect impaired function even of a single lateral canal. Later we showed that it was also possible to test individual vertical canal function in peripheral and also in central vestibular disorders and proposed a physiological mechanism for why this might be so. For the next 20 years, between 1988 and 2008, impulsive testing of individual SCC function could only be accurately done by a few aficionados with the time and money to support scleral search-coil systems-an expensive, complicated and cumbersome, semi-invasive technique that never made the transition from the research lab to the dizzy clinic...
2017: Frontiers in Neurology
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