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vestibular movement disorders

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https://www.readbyqxmd.com/read/29099407/ocular-motor-dysfunction-due-to-brainstem-disorders
#1
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/29060793/a-low-cost-video-oculography-system-for-vestibular-function-testing
#2
Jihwan Park, Youngsun Kong, Yunyoung Nam
In order to remain in focus during head movements, vestibular-ocular reflex causes eyes to move in the opposite direction to head movement. Disorders of vestibular system decrease vision, causing abnormal nystagmus and dizziness. To diagnose abnormal nystagmus, various studies have been reported including the use of rotating chair tests and videonystagmography. However, these tests are unsuitable for home use due to their high costs. Thus, a low-cost video-oculography system is necessary to obtain clinical features at home...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29037661/antisense-oligonucleotide-therapy-rescues-disruptions-in-organization-of-exploratory-movements-associated-with-usher-syndrome-type-1c-in-mice
#3
Tia N Donaldson, Kelsey T Jennings, Lucia A Cherep, Adam M McNeela, Frederic F Depreux, Francine M Jodelka, Michelle L Hastings, Douglas G Wallace
Usher syndrome, Type 1C (USH1C) is an autosomal recessive inherited disorder in which a mutation in the gene encoding harmonin is associated with multi-sensory deficits (i.e., auditory, vestibular, and visual). USH1C (Usher) mice, engineered with a human USH1C mutation, exhibit these multi-sensory deficits by circling behavior and lack of response to sound. Administration of an antisense oligonucleotide (ASO) therapeutic that corrects expression of the mutated USH1C gene, has been shown to increase harmonin levels, reduce circling behavior, and improve vestibular and auditory function...
February 15, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29036855/diagnostic-criteria-for-persistent-postural-perceptual-dizziness-pppd-consensus-document-of-the-committee-for-the-classification-of-vestibular-disorders-of-the-b%C3%A3-r%C3%A3-ny-society
#4
Jeffrey P Staab, Annegret Eckhardt-Henn, Arata Horii, Rolf Jacob, Michael Strupp, Thomas Brandt, Adolfo Bronstein
This paper presents diagnostic criteria for persistent postural-perceptual dizziness (PPPD) to be included in the International Classification of Vestibular Disorders (ICVD). The term PPPD is new, but the disorder is not. Its diagnostic criteria were derived by expert consensus from an exhaustive review of 30 years of research on phobic postural vertigo, space-motion discomfort, visual vertigo, and chronic subjective dizziness. PPPD manifests with one or more symptoms of dizziness, unsteadiness, or non-spinning vertigo that are present on most days for three months or more and are exacerbated by upright posture, active or passive movement, and exposure to moving or complex visual stimuli...
October 7, 2017: Journal of Vestibular Research: Equilibrium & Orientation
https://www.readbyqxmd.com/read/29020061/catching-up-children-with-developmental-coordination-disorder-compared-to-healthy-children-before-and-after-sensorimotor-therapy
#5
COMPARATIVE STUDY
Mats Niklasson, Torsten Norlander, Irene Niklasson, Peder Rasmussen
The aims of the present study were to (a) compare healthy children in terms of sensorimotor maturity to untreated children diagnosed with developmental coordination disorder (DCD) and (b) compare healthy children to diagnosed children following completed treatment with sensorimotor therapy. Participants were 298 children, 196 boys and 102 girls, distributed into a Norm group of healthy children (n = 99) and a group of children diagnosed with DCD (n = 199) with a total mean age of 8.77 years (SD = 2.88). Participants in both groups were assessed on instruments aimed to detect sensorimotor deviations...
2017: PloS One
https://www.readbyqxmd.com/read/29017000/visual-and-postural-motion-evoked-dizziness-symptoms-are-predominant-in-vestibular-migraine-patients
#6
Doga Vuralli, Funuzar Yildirim, Didem T Akcali, Mustafa N Ilhan, Nebil Goksu, Hayrunnisa Bolay
Background: Vestibular migraine (VM) is one of the most common underdiagnosed disorders. We aimed to study the clinical characteristics of VM patients who were referred to a neurology-headache unit by otolaryngology after exclusion of peripheral causes of vertigo. Methods: One hundred and one patients diagnosed with VM in the headache unit were included. Description of vestibular symptoms, demographic and clinical features, trigger factors, accompanying diseases, and response to vestibular-suppressant medications and prophylactic migraine treatment were evaluated...
July 13, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28965306/current-treatment-options-vestibular-migraine
#7
REVIEW
Clinton G Lauritsen, Michael J Marmura
Vestibular migraine (VM) is a disorder with a spectrum of clinical presentations and among the most common causes of chronic vestibular symptoms. Some present with attacks before or during typical migraine, but many others have fluctuating or daily symptoms. While the symptoms and pathogenesis of vestibular migraine may have elements of both central and peripheral disorders, hearing loss should be absent. VM typically worsens with activity and head movements in general, and encompasses symptoms of vertigo, disequilibrium, or imbalance...
September 30, 2017: Current Treatment Options in Neurology
https://www.readbyqxmd.com/read/28917252/stereotactic-radiosurgery-of-the-brain-a-review-of-common-indications
#8
Philip Gilbo, Isabella Zhang, Jonathan Knisely
Over the past half-century since Lars Leksell first utilized radiation to address deep and difficult to treat lesions of the central nervous system (CNS), intracranial stereotactic radiosurgery (SRS) has become an increasingly valued tool in the hands of neurosurgeons and radiation oncologists. Following developments in medical imaging and radiation technology, radiosurgery has evolved from its first application in movement disorders to widespread use for a varied range of malignant and benign conditions. SRS remains a powerful, minimally invasive instrument that offers additional options for intervention to a diverse patient population...
September 2017: Chinese Clinical Oncology
https://www.readbyqxmd.com/read/28885964/cervical-joint-position-sense-in-hypobaric-conditions-a-randomized-double-blind-controlled-trial
#9
Diana Bagaianu, Damien Van Tiggelen, N Duvigneaud, Veerle Stevens, Danny Schroyen, Dirk Vissenaeken, Gino D'Hondt, Laurent Pitance
Well-adapted motor actions require intact and well-integrated information from all of the sensory systems, specifically the visual, vestibular, and somatosensory systems, including proprioception. Proprioception is involved in the sensorimotor control by providing the central nervous system with an updated body schema of the biomechanical and spatial properties of the body parts. With regard to the cervical spine, proprioceptive information from joint and muscle mechanoreceptors is integrated with vestibular and visual feedback to control head position, head orientation, and whole body posture...
September 2017: Military Medicine
https://www.readbyqxmd.com/read/28767521/disabling-central-paroxysmal-positioning-upbeat-nystagmus-and-vertigo-associated-with-the-presence-of-anti-glutamic-acid-decarboxylase-antibodies
#10
Ana I Martins, João N Carvalho, Ana M Amorim, Argemiro Geraldo, Eric Eggenberger, João Lemos
An immune attack by anti-glutamic acid decarboxylase (GAD) antibodies is believed to cause a deficiency in gamma-aminobutyric acid-mediated neurotransmission in the cerebellum. This, in turn, leads to several eye movement disorders, including spontaneous downbeat (DBN) and periodic alternating nystagmus. We describe a 68-year-old diabetic woman with disabling paroxysmal positioning upbeat nystagmus (UBN) exclusively in the supine position, associated with asymptomatic spontaneous DBN, alternating skew deviation and hyperactive vestibulo-ocular reflex responses on head impulse testing, in whom high titers of anti-GAD antibodies were detected...
August 1, 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/28742631/vestibular-function-in-adults-with-epilepsy-of-unknown-etiology
#11
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...
September 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28705044/the-genetics-of-hair-cell-function-in-zebrafish
#12
Teresa Nicolson
Our ears are remarkable sensory organs, providing the important senses of balance and hearing. The complex structure of the inner ear, or 'labyrinth', along with the assorted neuroepithelia, have evolved to detect head movements and sounds with impressive sensitivity. The rub is that the inner ear is highly vulnerable to genetic lesions and environmental insults. According to National Institute of Health estimates, hearing loss is one of the most commonly inherited or acquired sensorineural diseases. To understand the causes of deafness and balance disorders, it is imperative to understand the underlying biology of the inner ear, especially the inner workings of the sensory receptors...
July 13, 2017: Journal of Neurogenetics
https://www.readbyqxmd.com/read/28649224/the-video-head-impulse-test
#13
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
https://www.readbyqxmd.com/read/28623390/disturbed-cervical-proprioception-affects-perception-of-spatial-orientation-while-in-motion
#14
Eva-Maj Malmström, Per-Anders Fransson, Terese Jaxmar Bruinen, Semir Facic, Fredrik Tjernström
The proprioceptive, visual and vestibular sensory systems interact to maintain dynamic stability during movement. The relative importance and interplay between these sensory systems is still not fully understood. Increased knowledge about spatial perception and postural orientation would provide better understanding of balance disorders, and their rehabilitation. Displacement of the body in space was recorded in 16 healthy subjects performing a sequence of stepping-in-place tests without any visual or auditory cues...
June 17, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28529496/treatment-of-the-mal-de-debarquement-syndrome-a-1-year-follow-up
#15
Mingjia Dai, Bernard Cohen, Catherine Cho, Susan Shin, Sergei B Yakushin
The mal de debarquement syndrome (MdDS) is a movement disorder, occurring predominantly in women, is most often induced by passive transport on water or in the air (classic MdDS), or can occur spontaneously. MdDS likely originates in the vestibular system and is unfamiliar to many physicians. The first successful treatment was devised by Dai et al. (1), and over 330 MdDS patients have now been treated. Here, we report the outcomes of 141 patients (122 females and 19 males) treated 1 year or more ago. We examine the patient's rocking frequency, body drifting, and nystagmus...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28485653/vestibular-rehabilitation-in-benign-paroxysmal-positional-vertigo-reality-or-fiction
#16
Federica Bressi, Paola Vella, Manuele Casale, Antonio Moffa, Lorenzo Sabatino, Michele Antonio Lopez, Francesco Carinci, Rocco Papalia, Fabrizio Salvinelli, Silvia Sterzi
The objective of this article is to systematically review the evidence on the effectiveness of vestibular rehabilitation (VR) in patients with benign paroxysmal positional vertigo (BPPV). Relevant published studies about VR in BPPV were searched in PubMed, Google Scholar and Ovid using various keywords. We included trials that were available in the English language and did not apply publication year or publication status restrictions. Studies based on the VR in other peripheral and/or central balance disorders are excluded...
June 2017: International Journal of Immunopathology and Pharmacology
https://www.readbyqxmd.com/read/28424657/magnetic-vestibular-stimulation-mvs-as-a-technique-for-understanding-the-normal-and-diseased-labyrinth
#17
REVIEW
Bryan K Ward, Jorge Otero-Millan, Prem Jareonsettasin, Michael C Schubert, Dale C Roberts, David S Zee
Humans often experience dizziness and vertigo around strong static magnetic fields such as those present in an MRI scanner. Recent evidence supports the idea that this effect is the result of inner ear vestibular stimulation and that the mechanism is a magnetohydrodynamic force (Lorentz force) that is generated by the interactions between normal ionic currents in the inner ear endolymph and the strong static magnetic field of MRI machines. While in the MRI, the Lorentz force displaces the cupula of the lateral and anterior semicircular canals, as if the head was rotating with a constant acceleration...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28397001/gait-ataxia-in-humans-vestibular-and-cerebellar-control-of-dynamic-stability
#18
Roman Schniepp, Ken Möhwald, Max Wuehr
During human locomotion, vestibular feedback control is fundamental for maintaining dynamic stability and adapting the gait pattern to external circumstances. Within the supraspinal locomotor network, the cerebellum represents the key site for the integration of vestibular feedback information. The cerebellum is further important for the fine-tuning and coordination of limb movements during walking. The aim of this review article is to highlight the shared structural and functional sensorimotor principles in vestibular and cerebellar locomotion control...
April 10, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28284887/downbeat-nystagmus-due-to-ranitidine-in-a%C3%A2-pediatric-patient
#19
Laura Butragueño Laiseca, Blanca Toledo Del Castillo, Cristina Rodríguez Jimenez, Silvia Manrique-Rodríguez, Jimena Pérez Moreno
BACKGROUND: Ranitidine has not been considered as a potential cause of ocular movement conditions. However, it is known that the vestibular nucleus complex, that has a key role in gaze control and vestibule-ocular reflexes, receives hypothalamic histaminergic innervations. Some studies reported the effect of ranitidine blocking the excitatory responses of vestibular nuclei neurons to histamine. CASE REPORT: We report the first case of a downbeat nystagmus secondary to ranitidine in an infant...
February 11, 2017: European Journal of Paediatric Neurology: EJPN
https://www.readbyqxmd.com/read/28238393/preliminary-evidence-of-improved-cognitive-performance-following-vestibular-rehabilitation-in-children-with-combined-adhd-cadhd-and-concurrent-vestibular-impairment
#20
Younes Lotfi, Nima Rezazadeh, Abdollah Moossavi, Hojjat Allah Haghgoo, Reza Rostami, Enayatollah Bakhshi, Faride Badfar, Sedigheh Farokhi Moghadam, Vahid Sadeghi-Firoozabadi, Yousef Khodabandelou
OBJECTIVE: Balance function has been reported to be worse in ADHD children than in their normal peers. The present study hypothesized that an improvement in balance could result in better cognitive performance in children with ADHD and concurrent vestibular impairment. This study was designed to evaluate the effects of comprehensive vestibular rehabilitation therapy on the cognitive performance of children with combined ADHD and concurrent vestibular impairment. METHODS: Subject were 54 children with combined ADHD...
December 2017: Auris, Nasus, Larynx
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