From Big Medical Encyclopedia

CORIOLIS ACCELERATION (G. G. Coriolis, the fr. mathematician and the mechanic, 1792 — 1843) — the acceleration arising at impact on a body of the force causing uniform rotation and causing linear movement of a body in relation to an axis of rotation. To. at. it is open Coriolis who gave it and theoretical justification. To. at. (Wkop) is expressed by a formula 2ωVsinα where ω — the angular speed of rotation of system, V — the speed of the movement of a body in the rotating reference system, sinα — a sine of the angle between a vector of angular speed of the rotating system and a vector of speed of a body (at coal less than 90 °).

During the movement in moving system diversely (the movement bending, extension and an inclination of a trunk) so-called precession accelerations which reason addition of forces forcing a body to rotate on two axes and more is arise the head. Calculations of such accelerations are made by Stone and Letko (R. W. Stone, W. Letko, 1965) and «mutually cross angular accelerations» or «angular accelerations of Coriolis» are called by them. The second name in relation to To. at. is wrong and to some extent confuses a question about To. at.

To. at., as well as precession acceleration, is adequate to a razdrazhita of l I eat receptors of a vestibular mechanism. Action To. at. on a human body V. I was established. Voyachek in 1908 which, analyzing a so-called phenomenon of Purkinye (dizziness and illusions of space situation at persons during their rotation with the simultaneous movement by the head and a trunk in the plane, perpendicular to an axis of rotation), explained it with influence To. at. on a vestibular mechanism.

Due to the development of aircraft and astronautics the question of Coriolis and precession accelerations is intensively developed. The special attention was drawn by studying To. at. in space medicine since in space flights of the movement of the person in the rotating systems are inevitable, and as practice showed, Coriolis and precession accelerations are the most adverse from the point of view of their influence on an organism.

See also Acceleration, action on an organism .

Bibliography: Biomedical researches, under the editorship of O. G. Gazenko, etc., page 20, 195, M., 1976; Voyachek V. I. Current state of a question of physiology and clinic of a vestibular mechanism, Zhurn, ushn., Nov. and throats. Bol., t. 4, No. 3-4, page 121, 1927; At with e in V. M. and d river. About mechanisms of interaction of receptors of a vestibular mechanism, L., 1978, bibliogr.; To Ur and sh in and l and A. E. and Babiyak V. I. Physiological functions of vestibular system, L., 1975, bibliogr.; Fundamentals of bioastronautics and medicine, under the editorship of O. G. Gazenko and M. Calvin, t. 2, book 1, page 265, M., 1975; With and r to and with about in I. Yu. and Sh and p about in A. A. Coriolis acceleration and precession angular acceleration — adequate irritants of different divisions of a vestibular mechanism, Izv. Academy of Sciences of the USSR, it is gray. biol., No. 3, page 425, 1974, bibliogr.; Stone R. W. and. L e t-k o W. Some observations on the stimulation of the vestibular system of man in a rotating environment, Symp. on the role of the vestibular organs in the exploration of space, p. 263, Washington, 1965.

A. P. Popov.