Significance of head-shaking nystagmus in the evaluation of the dizzy patient.

Significance of head-shaking nystagmus in the evaluation of the dizzy patient. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

Significance of head-shaking nystagmus in the evaluation of the dizzy patient. Abstract Text:

S Asawavichiangianda,M Fujimoto,M Mai,H Desroches,J Rutka,

In a series of studies, the phenomenon of head-shaking nystagmus (HSN) was assessed in 50 control subjects and 1364 consecutive dizzy patients who underwent formal electronystagmography (ENG) at the Toronto Hospital Center for Advanced Hearing and Balance Testing. HSN was compared in a series of 30 patients who underwent conventional electro-oculography (EOG) vs magnetic (scleral) coil eye movement recordings. Clinical correlation of HSN to other parameters of the ENG test battery was performed in another sub-series of 300 patients with known diagnoses. HSN was identified in 31.7% of dizzy patients vs 24% of control subjects. No significant difference in its manifestation was noted between active vs passive head-shaking tests or on EOG vs magnetic (scleral) coil eye movement recordings. When compared to other aspects of the ENG test battery, HSN was neither specific nor sensitive for vestibular dysfunction. It nevertheless correlated well with the presence of a caloric reduction and with increasing R/L excitability differences on ENG testing. When present, HSN was characteristically monophasic in 76.8%, biphasic in 22.7% and triphasic in 0.5% of subjects. The initial direction of HSN generally obeyed Ewald's second law, but the reverse was noted in 27% with monophasic and 17.6% of patients with biphasic HSN. In the subseries of 300 patients with known diagnoses, the presence of HSN was statistically significant (p < 0.05) in patients with peripheral vestibular dysfunction vs psychogenic dizziness. Its presence was also significant in well-documented peripheral vestibular disorders such as Meniere's disease (p < 0.01), vestibular neuronitis (p < 0.05) and acoustic neuroma (p < 0.05). Localization of the disease involvement based on the initial direction of HSN was especially unpredictable in patients with Meniere's disease. The significance and usefulness of the head-shake test in the otoneurological evaluation of the dizzy patient is further commented on.

Significance of head-shaking nystagmus in the evaluation of the dizzy patient. Publishing Authors By Initials

S Asawavichiangianda,M Fujimoto,M Mai,H Desroches,J Rutka,

For similar diagnosis: diagnostic techniques and procedures: diagnostic techniques, otological: vestibular function tests research abstracts see: diagnosis: diagnostic techniques and procedures: diagnostic techniques, otological: vestibular function tests research

PUBMED ID PMID:

MEDLINE DATE:

Significance of head-shaking nystagmus in the evaluation of the dizzy patient. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Acta oto-laryngologica. Supplementum

VOLUME: 540

Page Numbers: 27-33

Journal Abbreviation:

ISSN: 0365-5237

DAY: 13

MONTH: 02

YEAR: 1999

Significance of head-shaking nystagmus in the evaluation of the dizzy patient. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 370355

Significance of head-shaking nystagmus in the evaluation of the dizzy patient. Keywords Mesh Terms:

KEYWORDS: Vestibular Function Tests

MESH TERMS: physiopathology

Chemical & Substance for Abstract: Significance of head-shaking nystagmus in the evaluation of the dizzy patient. Information

Substance Name:

Registry Number:

Grant and Affiliation Information for Significance of head-shaking nystagmus in the evaluation of the dizzy patient.

AFFILIATION: Department of Otolaryngology, Chulalongkorn University, Bangkok, Thailand.

Country: NORWAY

AGENCY:

GRANT:

ACRONYM:

MEDLINETA: Acta Otolaryngol Suppl

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

Significance of head-shaking nystagmus in the evaluation of the dizzy patient Related Publications

• Advances in the management of epilepsy.
• Canadian Neuro-oncology '98 - Eighth Biennial Meeting.
• Comparison of tumor markers in patients with squamous cell carcinoma of the head and neck.
• Conservative management of vestibular schwannomas: third review of a 10-year prospective study.
• Corpus callosotomy in children and the disconnection syndromes: a review.
• Corpus callosotomy in children with intractable epilepsy using frameless stereotactic neuronavigation: 12-year experience at The Hospital for Sick Children in Toronto.
• Endonasal resection of craniopharyngiomas.
• Expression of MAGE and GAGE genes in medulloblastoma and modulation of resistance to chemotherapy.
• Malignant brain tumors: two steps forward.
• Olfactory dysfunction in head injured workers.
• Role of myosin II activity and the regulation of myosin light chain phosphorylation in astrocytomas.
• Significance of head-shaking nystagmus in the evaluation of the dizzy patient.
• The molecular genetics of medulloblastoma: an assessment of new therapeutic targets.
• The presence of ganglion cells in the human middle ear: a histological survey.
• The role of fascin in the migration and invasiveness of malignant glioma cells.
• Unusual eustachian tube mass: glomus tympanicum.
• Utility of neuronavigation and neuromonitoring in epilepsy surgery.
• What would you do if you had a small vestibular schwannoma? An apocryphal tale.
• p14ARF interacts with DAXX: effects on HDM2 and p53.