BABINSKY REFLEX (J. Babinski, fr. neuropathologist, 1857 — 1932; a synonym in the countries of English language: an ex-tensor bottom reflex) — slow tonic extension of a thumb of a leg, to a lesser extent other fingers, arising at intensive shaped irritation of an outside part of a sole; represents a modified bottom reflex (fig). Reaction of the II—V fingers can be also other: fingers can fan, sometimes remain motionless or make bottom bending in small degree. It is described by Babinsky in 1896. At the child up to 2 — 2,5 years of B. the river is physiological. At more advanced age it becomes a symptom of the organic disease of a nervous system proceeding with defeat of a pyramidal path. The B. river is observed even at very small paresis of a leg which is followed by pyramidal spasticity of muscles and high tendon jerks. It dies away only in parallel with involution of other pyramidal symptoms. The question of whether B. of river depends on defeat, in addition to pyramidal, any other system, remains still open. There is a point of view that B. of river not isolated symptom, and a component of proceeding is hidden the general defense ukorotitelny reaction of the lower extremity.
See. Reflexes pathological .
Bibliogr. M. B. crawl ifedoro-in and E. A. Main neuropathological syndromes, M., 1966; Babinski J. Sur le rgflexe cutan6 plantaire dans certaines affections organiques du systeme nerveux central, C. R. Soc. Biol. (Paris), ser. 10, t. Ill, p. 207, 1896.
V. V. Mikheyev.