From Big Medical Encyclopedia

DEPRIVATION (late lat. deprivatio loss, deprivation) — isolation from external irritants. Quite wide spread occurance and recognition was gained by the concept «touch deprivation» («perceptual isolation»), under a cut mean long and full switching off of any touch irritant.

Touch D. is characterized by a number of mental disorders: the strong need for the active movements and touch impressions, the increased suggestibility, easing of ability to concentrate, disturbances of thought process, illusion and it is frequent even hallucinatory and crazy phenomena. Such mental changes are described at some emergency («extreme») situations at the persons which are in loneliness after ship-wrecks at lonely travel by the sea on small vessels, etc.

In clinic touch D. plays a certain pathogenetic role at some mental disorders, napr, at the visual and acoustical gallyutsinoza which are observed quite often at deafs, blind people or at patients after eye operations which are followed by temporary deprivation of vision (so-called gallyutsinoza like Bonnet).

Bibliography: Shternberg E. Ya. About hallucinatory states at hard of hearing, in book: Vopr, psikhiat., under the editorship of 3. A. Veniyeri, etc., century 3, page 472, M., 1959; it, Visual gallyutsinoza at blind people, in book: Vopr. the wedge, also rubbed. the loony, diseases, under the editorship of A. L. Andreyev, page 100, M., 1960; In about n d at S. Page a. M a r g about 1 i s F. L. Sensory deprivation and brain development, Jena, 1971.

E. Ya. Shternberg.