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A head-tilt caloric test for evaluating the vertical semicircular canal function. 2009

Sachiko Aoki, and Yasuko Arai, and Keiko Yoda, and Suguru Nishida
Department of Otolaryngology, Tokyo Women's Medical University Medical Center East, 2-1-10 Nishiogu, Arakawaku, Tokyo, Japan. sachikoaoki@eagle.ocn.ne.jp

CONCLUSIONS The caloric test with head-tilt can be used as a tool for assessing vertical canal function as an office procedure. OBJECTIVE Evaluation of vertical canal function. METHODS We provoked caloric response by cold water in the vertiginous patients in supine position. During the culmination of the response we rotated the head 45 degrees from the sagittal plane to place the posterior canal to earth-vertical. Thereafter we rotated the head 45 degrees to the opposite direction to place the anterior canal to earth-vertical. The eye movements were recorded by two-dimensional electronystagmography. The data collected from the examination of 100 ears with normal caloric response in horizontal component were analyzed. RESULTS The down-beating vertical component intensified when the posterior canal was placed to earth-vertical. The up-beating vertical component intensified when the anterior canal was placed to earth-vertical. These findings suggested that the vertical canals were functioning.

UI MeSH Term Description Entries
D008297 Male Males
D009949 Orientation Awareness of oneself in relation to time, place and person. Cognitive Orientation,Mental Orientation,Psychological Orientation,Cognitive Orientations,Mental Orientations,Orientation, Cognitive,Orientation, Mental,Orientation, Psychological,Orientations,Orientations, Cognitive,Orientations, Mental,Orientations, Psychological,Psychological Orientations
D010033 Otitis Media Inflammation of the MIDDLE EAR including the AUDITORY OSSICLES and the EUSTACHIAN TUBE. Middle Ear Inflammation,Inflammation, Middle Ear
D011187 Posture The position or physical attitude of the body. Postures
D012016 Reference Values The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality. Normal Range,Normal Values,Reference Ranges,Normal Ranges,Normal Value,Range, Normal,Range, Reference,Ranges, Normal,Ranges, Reference,Reference Range,Reference Value,Value, Normal,Value, Reference,Values, Normal,Values, Reference
D002150 Caloric Tests Elicitation of a rotatory nystagmus by stimulating the semicircular canals with water or air which is above or below body temperature. In warm caloric stimulation a rotatory nystagmus is developed toward the side of the stimulated ear; in cold, away from the stimulated side. Absence of nystagmus indicates the labyrinth is not functioning. Barany Test,Barany's Test,Baranys Test,Caloric Test,Test, Barany,Test, Barany's,Test, Caloric,Tests, Caloric
D003639 Hearing Loss, Sudden Sensorineural hearing loss which develops suddenly over a period of hours or a few days. It varies in severity from mild to total deafness. Sudden deafness can be due to head trauma, vascular diseases, infections, or can appear without obvious cause or warning. Deafness, Sudden,Sudden Deafness,Sudden Hearing Loss
D004584 Electronystagmography Recording of nystagmus based on changes in the electrical field surrounding the eye produced by the difference in potential between the cornea and the retina. Electronystagmographies
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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