keyword
MENU ▼
Read by QxMD icon Read
search

spontaneous nystagmus

keyword
https://www.readbyqxmd.com/read/28050208/tonic-investigation-concept-of-cervico-vestibular-muscle-afferents
#1
Linda Josephine Dorn, Annabelle Lappat, Winfried Neuhuber, Hans Scherer, Heidi Olze, Matthias Hölzl
Introduction Interdisciplinary research has contributed greatly to an improved understanding of the vestibular system. To date, however, very little research has focused on the vestibular system's somatosensory afferents. To ensure the diagnostic quality of vestibular somatosensory afferent data, especially the extra cranial afferents, stimulation of the vestibular balance system has to be precluded. Objective Sophisticated movements require intra- and extra cranial vestibular receptors. The study's objective is to evaluate an investigation concept for cervico-vestibular afferents with respect to clinical feasibility...
January 2017: International Archives of Otorhinolaryngology
https://www.readbyqxmd.com/read/28018691/intra-attack-vestibuloocular-reflex-changes-in-m%C3%A3-ni%C3%A3-re-s-disease
#2
Dario A Yacovino, John B Finlay
Ménière's attack has been shown to temporarily alter the vestibuloocular reflex (VOR). A patient with unilateral Ménière's disease was serially evaluated with the video Head Impulse Test during single, untreated episodes of acute vertigo. Spontaneous nystagmus activity was concurrently recorded in order to establish the three typical phases of Ménière's attack (irritative, paralytic, and recovery) and correlate them with VOR performance. The onset of attack was associated with a quick change in VOR gain on the side of the affected ear...
2016: Case Reports in Otolaryngology
https://www.readbyqxmd.com/read/27958203/a-previously-unidentified-deletion-in-g-protein-coupled-receptor-143-causing-x-linked-congenital-nystagmus-in-a-chinese-family
#3
Jing Liu, Yanlei Jia, Lejin Wang, Juan Bu
BACKGROUND: Congenital nystagmus (CN) is characterized by conjugated, spontaneous, and involuntary ocular oscillations. It is an inherited disease and the most common inheritance pattern is X-linked CN. In this study, our aim is to identify the disease-causing mutation in a large sixth-generation Chinese family with X-linked CN. METHODS: It has been reported that mutations in four-point-one, ezrin, radixin, moesin domain-containing 7 gene (FRMD7) and G protein-coupled receptor 143 gene (GPR143) account for the majority patients of X-linked nystagmus...
November 2016: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/27926585/fluctuating-vestibulo-ocular-reflex-in-m%C3%A3-ni%C3%A3-re-s-disease
#4
Dario A Yacovino, Timothy C Hain, Maria Musazzi
OBJECTIVES: To describe the fluctuating high velocity vestibular ocular-reflex (VOR) during the Ménière's attacks and correlate those features with pathophysiology. PATIENTS: A patient with unilateral Ménière's disease (MD) was evaluated closely during and after acute vertigo episodes. MAIN OUTCOME MEASURES: The spontaneous nystagmus and the dynamic VOR changes were measured by the video head impulse test (VHIT) at different stages of the vertigo crisis and during the quiescent phase of the condition...
December 6, 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27855460/-diagnosis-and-current-therapy-of-vestibular-syndromes
#5
Michael Strupp, Thomas Brandt
Vertigo and dizziness are with an annual incidence of more than 10% and a lifetime prevalence of more than 30% among the most frequent symptoms. The keys to the diagnosis are the patient history and the bedside examination: a) for the patient history the time course, type and triggers of symptoms and accompanying symptoms, b) for the clinical examination of the vestibular system the head-impulse test (HIT), the examination for a spontaneous nystagmus, a displacement of subjective visual vertical, a positional nystagmus and the Romberg test, and c) for the differentiation between an acute peripheral and central vestibular lesion the skew deviation, central fixation nystagmus, gaze-evoked nystagmus, saccadic smooth pursuit and a normal HIT...
November 2016: Deutsche Medizinische Wochenschrift
https://www.readbyqxmd.com/read/27780909/benign-paroxysmal-positional-vertigo-secondary-to-mild-head-trauma
#6
Dimitrios G Balatsouras, George Koukoutsis, Andreas Aspris, Alexandros Fassolis, Antonis Moukos, Nicolas C Economou, Michael Katotomichelakis
OBJECTIVES: We studied the clinical characteristics, nystagmographic findings, and treatment outcome of a group of patients with benign paroxysmal positional vertigo (BPPV) secondary to mild head trauma and compared them with a group of patients with idiopathic BPPV. METHODS: The medical records of 33 patients with BPPV associated with mild head trauma were reviewed. Data of a complete otolaryngological, audiological, neurotologic, and imaging evaluation were available for all patients...
January 2017: Annals of Otology, Rhinology, and Laryngology
https://www.readbyqxmd.com/read/27766472/delayed-vestibulopathy-after-heat-exposure
#7
Ileok Jung, Seo-Young Choi, Hyo-Jung Kim, Ji-Soo Kim
Even though dizziness is a common symptom of heat illness, comprehensive evaluation of the vestibular function has not been available in this potentially life-threatening disorder. Three patients developed vertigo about a week after heat exposure. Evaluation showed bilateral impairments of the vestibulo-ocular reflex during head impulses and the signs of vestibulocerebellar dysfunction that included spontaneous downbeat nystagmus, gaze-evoked nystagmus, and positional downbeat nystagmus. Exposure to excessive heat may give rise to delayed vestibulopathy by damaging the vestibulocerebellum...
October 20, 2016: Journal of Neurology
https://www.readbyqxmd.com/read/27733568/nucleus-prepositus-hypoglossi-lesions-produce-a-unique-ocular-motor-syndrome
#8
Sung-Hee Kim, David S Zee, Sascha du Lac, Hyo Jung Kim, Ji-Soo Kim
OBJECTIVE: To describe the ocular motor abnormalities in 9 patients with a lesion involving the nucleus prepositus hypoglossi (NPH), a key constituent of a vestibular-cerebellar-brainstem neural network that ensures that the eyes are held steady in all positions of gaze. METHODS: We recorded eye movements, including the vestibulo-ocular reflex during head impulses, in patients with vertigo and a lesion involving the NPH. RESULTS: Our patients showed an ipsilesional-beating spontaneous nystagmus, horizontal gaze-evoked nystagmus more intense on looking toward the ipsilesional side, impaired pursuit more to the ipsilesional side, central patterns of head-shaking nystagmus, contralateral eye deviation, and decreased vestibulo-ocular reflex gain during contralesionally directed head impulses...
November 8, 2016: Neurology
https://www.readbyqxmd.com/read/27671714/vestibular-neuritis-with-minimal-canal-paresis-characteristics-and-clinical-implication
#9
Hyun Ji Kim, Dae-Young Kim, Jun Ha Hwang, Kyu-Sung Kim
Objectives: To analyze the clinical characteristics of vestibular neuritis patients with minimal canal paresis (canal paresis <25%). Methods: Patients clinically diagnosed with vestibular neuritis and treated at our institute (n=201) underwent otoneurological examination and vestibular function tests. Patients were categorized in terms of the. Results.: of caloric testing (canal paresis<25%, n=58; canal paresis≥25%, n=143). Clinical characteristics and laboratory outcomes were compared between two groups...
September 27, 2016: Clinical and Experimental Otorhinolaryngology
https://www.readbyqxmd.com/read/27638073/acute-unilateral-loss-of-vestibular-function
#10
M Fetter
Sudden unilateral loss of vestibular function is the most severe condition that can occur in the vestibular system. The clinical syndrome is caused by the physiologic properties of the vestibulo-ocular reflex (VOR) arc. In the normal situation, the two peripheral vestibular end organs are connected to a functional unit in coplanar pairs of semicircular canals working in a push-pull mode. "Push-pull" mode means that, when one side is excited, the other side is inhibited, and vice versa due to two mechanisms...
2016: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/27574724/preoperative-vestibular-assessment-protocol-of-cochlear-implant-surgery-an-analytical-descriptive-study
#11
Roseli Saraiva Moreira Bittar, Eduardo Setsuo Sato, Douglas Jósimo Silva Ribeiro, Robinson Koji Tsuji
INTRODUCTION: Cochlear implants are undeniably an effective method for the recovery of hearing function in patients with hearing loss. OBJECTIVE: To describe the preoperative vestibular assessment protocol in subjects who will be submitted to cochlear implants. METHODS: Our institutional protocol provides the vestibular diagnosis through six simple tests: Romberg and Fukuda tests, assessment for spontaneous nystagmus, Head Impulse Test, evaluation for Head Shaking Nystagmus and caloric test...
July 31, 2016: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/27553764/experimental-model-of-benign-paroxysmal-positional-vertigo-with-biphasic-nystagmus-using-isolated-semicircular-canals
#12
Masanori Yatomi, Yasuo Ogawa, Mamoru Suzuki, Koji Otsuka, Taro Inagaki, Ujimoto Konomi, Kiyoaki Tsukahara
CONCLUSIONS: The co-existence of cupulolithiasis and canalolithiasis might be a possible mechanism for the spontaneous inversion of positional nystagmus. OBJECTIVE: To investigate the mechanism of spontaneous inversion of nystagmus direction without a positional change in experimental models of co-existing cupulolithiasis and canalolithiasis. METHODS: Co-existing canalolithiasis and cupulolithiasis models were prepared using the bullfrog posterior semicircular canal (PSC)...
January 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/27538643/spontaneous-headshaking-and-positional-nystagmus-in-post-lateral-medullary-infarction-dizziness
#13
Kazumitsu Amari, Yosuke Kudo, Kosuke Watanabe, Masahiro Yamamoto, Koji Takahashi, Osamu Tanaka, Ken Johkura
BACKGROUND AND PURPOSE: Lateral medullary infarction (LMI) sometimes causes long-lasting dizziness. However, the characteristics of nystagmus in patients with post-LMI dizziness are unknown. We undertook a prospective, comparative study of nystagmus in patients with and without post-LMI dizziness to determine the characteristic pattern of nystagmus of chronic post-LMI dizziness. METHODS: We evaluated and compared nystagmus under spontaneous, head-shaking, and positional testing conditions in 12 patients with post-LMI dizziness and in 6 patients without post-LMI dizziness...
September 15, 2016: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/27386136/should-the-clinician-do-the-tests-for-benign-paroxysmal-positional-vertigo-even-in-the-presence-of-spontaneous-nystagmus-at-primary-gaze
#14
Sertac Yetiser
Different balance problems may occur in the same patient simultaneously, and the other problem may be overlooked if the clinician does not pay much attention. Spontaneous nystagmus of Meniere's disease and positional nystagmus of posterior canal BPPV in the same patient is presented. Positional tests must always be considered even in the presence of spontaneous nystagmus.
July 2016: Clinical Case Reports
https://www.readbyqxmd.com/read/27280102/a-case-of-undiagnosed-sleep-disorder-with-hearing-difficulty-and-dizziness
#15
Fumiyuki Goto, Miki Arai, Mitusru Kitamura, Tomoko Otomo, Ryoto Nagai, Shuujiro Minami, Takanobu Shimada, Tatsuo Matsunaga, Kouichi Tsunoda, Masato Fujii
INTRODUCTION: The aim of this case report was to investigate the relationship between sleep disorders and audio vestibular symptoms. CASE REPORT: A case of undiagnosed sleep disorder, presenting as a temporary auditory processing difficulty, is presented. The disorder was initially treated as sudden deafness with dizziness. A 23-year-old male patient complained of acute hearing disturbance despite normal results on pure tone audiometry. The patient was initially administered a steroid injection in the hospital...
March 2016: Iranian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/27228015/direction-reversing-nystagmus-in-horizontal-and-posterior-semicircular-canal-canalolithiasis
#16
Kyung-Hwa Jeong, Jung Eun Shin, Dong Hyuk Shin, Chang-Hee Kim
OBJECTIVES: To investigate the incidence and characteristics of direction-reversing nystagmus in patients with horizontal (HSCC) and posterior semicircular canal (PSCC) canalolithiasis, and evaluate the effect of direction-reversing nystagmus on the treatment outcome. STUDY DESIGN: A retrospective study. METHODS: Between March 2014 and September 2015, 63 and 92 consecutive patients with HSCC and PSCC canalolithiasis, respectively, were enrolled...
July 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27220295/-the-application-of-subjective-visual-gravity-in-assessment-of-vestibular-compensation-a-pilot-study
#17
Yuan Zhao, Taisheng Chen, Wei Wang, Kaixu Xu, Chao Wen, Qiang Liu, Xi Han, Shanshan Li, Xiaojie Li, Peng Lin
OBJECTIVE: To discuss the characteristics of subjective visual gravity (subjective visual vertical/horizontal, SVV/SVH) and assess its clinical application for peripheral unilateral vestibular compensation. METHODS: 69 cases of acute peripheral unilateral vestibular dysfunction patients (case group) accepted SVV/SVH, spontaneous nystagmus (SN), caloric test (CT) and other vestibular function tests. 49 healthy people (control group) accepted SVV/SVH only. SVV/SVH, SN and unilateral weakness (UW) were selected as for the observation indicators...
May 2016: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/27108843/ocular-findings-associated-with-chromosome-22q11-2-duplication
#18
Brian J Forbes, Donna M McDonald-McGinn, Georgia Wootton, Lindsay Dawson, Elaine Zackai, Gil Binenbaum
We describe the ocular features of the chromosome 22q11.2 duplication syndrome and provide ophthalmologic examination recommendations for affected patients. The medical records of 19 children with chromosome 22q11.2 duplication who had undergone complete ophthalmological examination, including dilated fundus examination and cycloplegic refraction, were studied retrospectively. Over half of the children with 22q11.2 duplication syndrome were found to have visually significant ocular abnormalities, including 6 with strabismus, 2 with moderately high astigmatism requiring glasses, 1 with unilateral congenital cataract requiring surgery, 1 with optic disk drusen, 1 with bilateral megalocornea with normal eye pressures, 1 with nystagmus that resolved spontaneously, and 1 with delayed visual maturation...
June 2016: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/27102718/change-of-nystagmus-direction-during-a-head-roll-test-in-lateral-semicircular-canal-cupulolithiasis
#19
Jung Eun Shin, Kyung-Hwa Jeong, Sung Hwan Ahn, Chang-Hee Kim
OBJECTIVE: To demonstrate positional nystagmus during a head-roll test in two patients with lateral semicircular canal (LSCC) cupulolithiasis who presented with spontaneous detachment of otoliths from the LSCC cupula, and to confirm that otoliths may adhere to both the utricle and canal sides of the cupula. PATIENTS AND METHODS: Using video nystagmography, positional nystagmus was evaluated in two patients with LSCC cupulolithiasis who showed the change of nystagmus direction during a head-roll test...
April 18, 2016: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/27022167/vestibular-end-organ-injury-induced-by-middle-ear-treatment-with-ferric-chloride-in-rats
#20
J H Lee, M S Kim, B R Park
Sensorineural hearing loss, ataxia, pyramidal signs, and vestibular deficits characterize superficial siderosis of the central nervous system. This study investigated changes in vestibular function, free radical formation, and phosphorylated cJun expression in the vestibular end organs after middle ear treatment with a ferric chloride (FeCl3) solution. A single injection of 70% FeCl3 solution into the unilateral middle ear cavity caused static vestibular symptoms, such as spontaneous nystagmus and head tilt...
February 2017: Human & Experimental Toxicology
keyword
keyword
102524
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"