Bárány Chair

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Bárány chair

[bə′rän·ē ‚cher]
A chair in which a person is revolved to test his susceptibility to vertigo.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Bárány Chair


a special rotating chair for investigating the functional condition of the vestibular apparatus, the organ of equilibrium. It was proposed by the Austrian scientist R. Bárány (1876–1936). The Bárány chair consists of a seat that rotates horizontally to the right and left. During the experiment (rotation) the subject experiences stimulations, which are transmitted from the vestibular apparatus to the medulla oblongata; as a result, jerky eye motions—rotatory nystagmus—arise as a reflex. After the Bárány chair is stopped, the speed with which nystagmus stops is used to judge the condition of the semicircular canals and other sections of the vestibular apparatus; the general reaction of the body to rotation is also observed. The Bárány chair is used in the selection of aviators and in medical examinations of pilots, astronauts, and others.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.