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Vestibular disorders

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https://www.readbyqxmd.com/read/29125531/posturographic-pattern-of-patients-with%C3%A2-chronic-subjective-dizziness-before-and%C3%A2-after-vestibular-rehabilitation
#1
Benoît Morisod, Maxime Mermod, Raphaël Maire
INTRODUCTION: Chronic subjective dizziness (CSD) is frequently encountered in neurotology clinics. This diagnosis is mainly clinical, but computerized dynamic posturography (CDP) could be a helpful instrumental tool in the identification of these patients and validation of the treatment. This study was aimed to look for a specific posturographic pattern among patients diagnosed with CSD, and to eventually visualize improvement after vestibular rehabilitation. METHODS: Single center, retrospective review from 2009 to 2014...
November 10, 2017: Journal of Vestibular Research: Equilibrium & Orientation
https://www.readbyqxmd.com/read/29125530/the-impact-of-symptoms-of-anxiety-and-depression-on-subjective-and-objective-outcome-measures-in-individuals-with-vestibular-disorders
#2
Sara G MacDowell, Rachel Trommelen, Ashlen Bissell, Lisa Knecht, Caitlin Naquin, Aryn Karpinski
BACKGROUND: Anxiety and depression are common in individuals with vestibular disorders and anecdotally symptoms of these disorders have been associated with poorer scores on subjective outcome measures of dizziness and balance. It is unknown if symptoms of psychological distress impact individual outcomes with vestibular rehabilitation therapy (VRT). OBJECTIVE: To compare subjective and objective outcome measures in subjects with vestibular disorders who have symptoms of anxiety and/or depression to those who do not exhibit those symptoms...
November 10, 2017: Journal of Vestibular Research: Equilibrium & Orientation
https://www.readbyqxmd.com/read/29123498/vestibular-deficits-in-neurodegenerative-disorders-balance-dizziness-and-spatial-disorientation
#3
REVIEW
Thomas Cronin, Qadeer Arshad, Barry M Seemungal
The vestibular system consists of the peripheral vestibular organs in the inner ear and the associated extensive central nervous system projections-from the cerebellum and brainstem to the thalamic relays to cortical projections. This system is important for spatial orientation and balance, both of critical ecological importance, particularly for successful navigation in our environment. Balance disorders and spatial disorientation are common presenting features of neurodegenerative diseases; however, little is known regarding central vestibular processing in these diseases...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29120919/nystagmus
#4
Alexander A Tarnutzer, Dominik Straumann
PURPOSE OF REVIEW: The clinical and laboratory assessment of nystagmus in patients with neurologic disorders can provide crucial elements for a state-of-the-art differential diagnosis. An increasing number of publications in the fields of neuro-otology and neuro-ophthalmology have nystagmus in the center of interest, which makes frequent updates on the diagnostic and therapeutic relevance of these contributions indispensable. This review covers important clinical studies and studies in basic research relevant for the neurologist published from January 2016 to August 2017...
November 7, 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/29118202/bayesian-optimal-adaptation-explains-age-related-human-sensorimotor-changes
#5
Faisal Karmali, Gregory T Whitman, Richard F Lewis
The brain uses information from different sensory systems to guide motor behavior, and aging is associated with a simultaneous decline in the quality of sensory information provided to the brain and a deterioration in motor control. Correlations between age-dependent decline in sensory anatomical structures and behavior have been demonstrated, and it has recently been suggested that a Bayesian framework could explain these relationships. Here we show that age-dependent changes in a human sensorimotor reflex, the vestibulo-ocular reflex, are explained by a Bayesian optimal adaptation in the brain occurring in response to death of motion-sensing hair cells...
November 8, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29112981/adjustment-of-the-dynamic-weight-distribution-as-a-sensitive-parameter-for-diagnosis-of-postural-alteration-in-a-rodent-model-of-vestibular-deficit
#6
Brahim Tighilet, David Péricat, Alais Frelat, Yves Cazals, Guillaume Rastoldo, Florent Boyer, Olivier Dumas, Christian Chabbert
Vestibular disorders, by inducing significant posturo-locomotor and cognitive disorders, can significantly impair the most basic tasks of everyday life. Their precise diagnosis is essential to implement appropriate therapeutic countermeasures. Monitoring their evolution is also very important to validate or, on the contrary, to adapt the undertaken therapeutic actions. To date, the diagnosis methods of posturo-locomotor impairments are restricted to examinations that most often lack sensitivity and precision...
2017: PloS One
https://www.readbyqxmd.com/read/29102239/comparison-of-the-video-head-impulse-test-with-the-caloric-test-in-patients-with-sub-acute-and-chronic-vestibular-disorders
#7
Anne Burston, Stuart Mossman, Benjamin Mossman, Mark Weatherall
The aim of this prospective register-based study was to compare video Head Impulse Tests (vHIT) with caloric tests on 173 patients assessed by a tertiary Neurology referral centre who had been referred for investigation of dizziness or vertigo and whose symptom duration was one month or longer. Abnormal vHIT was defined as angular velocity gain (peak eye velocity/peak head velocity) less than 0.79 at 80 ms and 0.75 at 60 ms, which was two standard deviations below our institutions' lower limit of normal; together with refixation saccades...
October 25, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29099695/algorithm-for-treatment-of-patients-with-mesial-occlusion-using-proprietary-orthodontic-device
#8
P Flis, V Filonenko, N Doroshenko
Early elimination of dentoalveolar apparatus orthodontic disorders is the dominant concept in the treatment technique. AIM: to present a sagittal anomalies treatment algorithm, of Class III particularly, in the transitional bite period by the proposed design of individual orthodontic devices with a movable ramp. The treatment algorithm consisted of several blocks: the motivation, the etiological factors establishment, the plan and treatment tactics creation basing on careful diagnosis, the stages of the active period of treatment and the patient management in the retention period...
October 2017: Georgian Medical News
https://www.readbyqxmd.com/read/29099407/ocular-motor-dysfunction-due-to-brainstem-disorders
#9
Seung-Han Lee, Hyo-Jung Kim, Ji-Soo Kim
BACKGROUND: The brainstem contains numerous structures including afferent and efferent fibers that are involved in generation and control of eye movements. EVIDENCE ACQUISITION: These structures give rise to distinct patterns of abnormal eye movements when damaged. Defining these ocular motor abnormalities allows a topographic diagnosis of a lesion within the brainstem. RESULTS: Although diverse patterns of impaired eye movements may be observed in lesions of the brainstem, medullary lesions primarily cause various patterns of nystagmus and impaired vestibular eye movements without obvious ophthalmoplegia...
November 2, 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/29095749/genetics-of-vestibular-syndromes
#10
Pablo Roman-Naranjo, Alvaro Gallego-Martinez, Jose A Lopez Escamez
PURPOSE OF REVIEW: The increased availability of next generation sequencing has enabled a rapid progress in the discovery of genetic variants associated with vestibular disorders. We have summarized molecular genetics finding in vestibular syndromes during the last 18 months. RECENT FINDINGS: Genetic studies continue to shed light on the genetic background of vestibular disorders. Novel genes affecting brain development and otolith biogenesis have been associated with motion sickness...
November 1, 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/29093067/practice-guideline-cervical-and-ocular-vestibular-evoked-myogenic-potential-testing-report-of-the-guideline-development-dissemination-and-implementation-subcommittee-of-the-american-academy-of-neurology
#11
Terry D Fife, James G Colebatch, Kevin A Kerber, Krister Brantberg, Michael Strupp, Hyung Lee, Mark F Walker, Eric Ashman, Jeffrey Fletcher, Brian Callaghan, David S Gloss
OBJECTIVE: To systematically review the evidence and make recommendations with regard to diagnostic utility of cervical and ocular vestibular evoked myogenic potentials (cVEMP and oVEMP, respectively). Four questions were asked: Does cVEMP accurately identify superior canal dehiscence syndrome (SCDS)? Does oVEMP accurately identify SCDS? For suspected vestibular symptoms, does cVEMP/oVEMP accurately identify vestibular dysfunction related to the saccule/utricle? For vestibular symptoms, does cVEMP/oVEMP accurately and substantively aid diagnosis of any specific vestibular disorder besides SCDS? METHODS: The guideline panel identified and classified relevant published studies (January 1980-December 2016) according to the 2004 American Academy of Neurology process...
November 1, 2017: Neurology
https://www.readbyqxmd.com/read/29089920/altered-insular-and-occipital-responses-to-simulated-vertical-self-motion-in-patients-with-persistent-postural-perceptual-dizziness
#12
Roberta Riccelli, Luca Passamonti, Nicola Toschi, Salvatore Nigro, Giuseppe Chiarella, Claudio Petrolo, Francesco Lacquaniti, Jeffrey P Staab, Iole Indovina
BACKGROUND: Persistent postural-perceptual dizziness (PPPD) is a common functional vestibular disorder characterized by persistent symptoms of non-vertiginous dizziness and unsteadiness that are exacerbated by upright posture, self-motion, and exposure to complex or moving visual stimuli. Recent physiologic and neuroimaging data suggest that greater reliance on visual cues for postural control (as opposed to vestibular cues-a phenomenon termed visual dependence) and dysfunction in central visuo-vestibular networks may be important pathophysiologic mechanisms underlying PPPD...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29089158/cerebellar-ataxia-with-neuropathy-and-vestibular-areflexia-syndrome-canvas
#13
Masakatsu Taki, Takashi Nakamura, Hiraku Matsuura, Tatsuhisa Hasegawa, Hirofumi Sakaguchi, Kanako Morita, Ryotaro Ishii, Ikuko Mizuta, Takashi Kasai, Toshiki Mizuno, Shigeru Hirano
Cerebellar ataxia with neuropathy and bilateral vestibular areflexia syndrome (CANVAS) is a novel ataxic disorder consisting of the triad of cerebellar impairment, bilateral vestibular hypofunction, and a somatosensory deficit. We report the first Japanese case of CANVAS. The patient is a 68-year-old Japanese male. He was referred to our university for further evaluation of progressive gait disturbance and ataxia. He exhibited horizontal gaze-evoked nystagmus and sensory deficit. Nerve conduction studies showed sensory neuronopathy...
October 28, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/29084103/postconcussion-symptom-reporting-after-mild-traumatic-brain-injury-in-female-service-members-impact-of-gender-posttraumatic-stress-disorder-severity-of-injury-and-associated-bodily-injuries
#14
Sara M Lippa, Tracey A Brickell, Jason M Bailie, Louis M French, Jan E Kennedy, Rael T Lange
OBJECTIVE: Examine effects of diagnostically relevant posttraumatic stress disorder (PTSD) symptoms, mild traumatic brain injury (TBI) severity, and associated bodily injury severity on postconcussion symptom reporting in female service members (SM) compared with a matched sample of male SM. SETTING: Six US military medical treatment facilities. PARTICIPANTS: A total of 158 SM (79 females, 79 males) evaluated within 30 months after mild TBI...
October 27, 2017: Journal of Head Trauma Rehabilitation
https://www.readbyqxmd.com/read/29084063/central-vertigo
#15
Jeong-Yoon Choi, Seung-Han Lee, Ji-Soo Kim
PURPOSE OF REVIEW: This review considers recent advances in central vertigo in terms of clinical and laboratory features and pathophysiology. RECENT FINDINGS: Strokes presenting dizziness-vertigo are more likely to be associated with a misdiagnosis in the emergency setting. The risk of future strokes after discharge is higher in patients diagnosed with peripheral vertigo than in control patients. Strokes and transient ischemic attacks account for one-quarter of acute transient vestibular syndrome...
October 27, 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/29080887/evaluation-of-vestibular-functions-in-patients-with-vogt-koyanagi-harada-disease
#16
Keishi Fujiwara, Shinya Morita, Kimiko Hoshino, Atsushi Fukuda, Yuji Nakamaru, Akihiro Homma
Vogt-Koyanagi-Harada (VKH) disease is an idiopathic, multisystem autoimmune disorder characterized by bilateral, diffuse granulomatous uveitis associated with neurological, audiovestibular, and dermatological manifestations. The purpose of this study is to investigate vestibular functions in patients with VKH disease. A total of 43 patients with VKH disease in Hokkaido University Hospital were enrolled in this study. Subjective symptoms such as dizziness or vertigo and the results of various vestibular examinations including nystagmus testing, caloric testing, and vestibular-evoked myogenic potential (VEMP) testing were investigated...
October 28, 2017: Audiology & Neuro-otology
https://www.readbyqxmd.com/read/29070830/environmental-stress-and-vestibular-inputs-modulate-cardiovascular-responses-to-orthostasis-in-hypertensive-rats
#17
Gábor Raffai, Csongor Csekő, György Nádasy, László Kocsis, László Dézsi, Stephen N Hunyor, Emil Monos
The frequent accompaniment of hypertension by orthostatic circulatory disorders prompted us to investigate the effect of repeated and sustained head-up and head-down tilt positions on cardiovascular responses in spontaneously hypertensive rats vs. Wistar rats using radiotelemetric implants. Repeated orthostasis caused a transient elevation in blood pressure (7.3±1.7 mmHg) and heart rate (39.7±10.5 BPM), while repeated antiorthostasis led only to reversible tachycardia (85.6±11.7-54.3±16.8 BPM) in spontaneously hypertensive rats...
October 26, 2017: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/29064832/prototype-tests-of-vertical-and-torsional-alignment-nulling-for-screening-vestibular-function
#18
M C Schubert, J Stitz, H S Cohen, H Sangi-Haghpeykar, A P Mulavara, B T Peters, J J Bloomberg
BACKGROUND: We have developed a non-invasive, behavioral measure of ocular alignment using a computer tablet, colored lenses, and touch screen software. OBJECTIVE: The goal of this study was to determine if these tests differentiate healthy controls from patients with vestibular disorders. METHODS: In the vertical alignment nulling test (VAN), subjects were asked to adjust a horizontal line that was offset vertically from a fixed horizontal line...
2017: Journal of Vestibular Research: Equilibrium & Orientation
https://www.readbyqxmd.com/read/29064826/ethovision%C3%A2-analysis-of-open-field-behaviour-in-rats-following-bilateral-vestibular-loss
#19
Phillip Aitken, Yiwen Zheng, Paul F Smith
Bilateral vestibular loss (BVL) causes a unique behavioural syndrome in rodents, with symptoms such as locomotor hyperactivity and changes in exploratory behaviour. Many of these symptoms appear to be indirect consequences of the loss of vestibular reflex function and are difficult to explain. Although such symptoms have been reported before, there have been few systematic studies of the effects of BVL using automated digital tracking systems in which many behavioural symptoms can be measured simultaneously with high precision...
2017: Journal of Vestibular Research: Equilibrium & Orientation
https://www.readbyqxmd.com/read/29064824/uncoupling-vor-and-vestibuloautonomic-retention-to-coriolis-acceleration-training-in-student-pilots-and-control-subjects
#20
Linjie Wang, Yi Cao, Cheng Tan, Qi Zhao, Siyang He, Dongbin Niu, Guohua Tang, Peng Zou, Lei Xing
PURPOSE: Explore the different vestibular physiologic response retention patterns after Coriolis acceleration training in student pilots and extend the results for use with Chinese astronauts in the future. METHODS: Twelve healthy control male subjects were screened from males familiar with vestibular training and who physically resembled the astronauts. Fourteen student pilots were selected from 23 participants by rotational vestibular function tests. All subjects were exposed to five-day continuous or intermittent Coriolis acceleration training...
2017: Journal of Vestibular Research: Equilibrium & Orientation
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