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Because of the unusual conditions confronted by the aviator, the physical examination of candidates for this branch of the government service is more rigid than for any other branch. Among the most important tests are those for determining the sense of equilibrium. The Bárány rotating chair, or the Jones modification of the chair is used (Fig. 1).
THE BÁRÁNY CHAIR
The essential factors in the construction of the chair are a foot-rest to allow the person examined to be revolved freely with his feet resting on the foot-rest, a few inches above the floor; a head-rest to hold the head firmly at the desired angle; a stop catch by which the examiner by pressing with his foot can instantly bring the rotating chair to a stop; and a long arm extending upward behind the chair at a slight angle, by means of which the examiner is able to rotate the
SMALL CP. EQUILIBRIUM TESTS FOR AVIATION RECRUITS. JAMA. 1917;LXIX(13):1078. doi:10.1001/jama.1917.25910400003014a