Electronystagmography in a blind patient with dizziness.A blind 90-year-old man came to the office with a 1-month history of lightheadedness that occurred while he was standing or walking. He was unable to walk in a straight line. The man said that during these episodes, he felt as though he had drunk too much champagne. He reported no hearing loss or aural fullness, but he experienced a binaural binaural /bi·nau·ral/ (bi-naw´r'l) pertaining to both ears. bin·au·ral adj. Having or relating to both ears. binaural pertaining to both ears. ringing when he shook his head. When he tried to direct his eyes straight ahead, his line of gaze strayed to the left, and he was unable to perform the sharpened tandem Romberg test. He had earlier experienced a "slight stroke." Electronystagmography revealed a satisfactory calibration for a blind patient. He had a direction-fixed right-beating nystagmus Nystagmus Definition Rhythmic, oscillating motions of the eyes are called nystagmus. The to-and-fro motion is generally involuntary. Vertical nystagmus occurs much less frequently than horizontal nystagmus and is often, but not necessarily, a sign of in all positions, which was markedly variable in the 300 supine position. Thus, his caloric caloric /ca·lo·ric/ (kah-lor´ik) pertaining to heat or to calories. ca·lor·ic adj. 1. Of or relating to calories. 2. Of or relating to heat. test-induced nystagmus could not be corrected. A reversal of the right-beating nystagmus following right-cool and left-warm stimuli indicated a binaural peripheral stimulation with appropriate central processing. The type 3 simultaneous binaural test indicated that the patient had a vestibular ves·tib·u·lar adj. Of, relating to, or serving as a vestibule, especially of the ear. Vestibular Pertaining to the vestibule; regarding the vestibular nerve of the ear which is linked to the ability to hear sounds. system abnormality of no localizing value. From Neurotologic Associates, P.C., New York City New York City: see New York, city. New York City City (pop., 2000: 8,008,278), southeastern New York, at the mouth of the Hudson River. The largest city in the U.S. . [Graph omitted] [Graph omitted] [Graph omitted] [Graph omitted] [Graph omitted] [Graph omitted] [Graph omitted] [Graph omitted] |
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