GEDA-SHERRENA LAW (H.Head, English neuropathologist, 1861 — 1940; J. Sherren, the English surgeon, 1872 — 1945) — the law establishing the sequence of recovery of separate types of the sensitivity lost after section of a cutaneous nerve.
In 1905 Ged in the experimental purposes allowed to cut at himself a superficial branch of a beam nerve and a lateral cutaneous nerve of a forearm. The cut ends of nerves were sewed. The psychophysiologist of W. Rivers studied loss and gradual recovery of sensitivity at G. Ged. Researches on recovery of sensitivity after defeats of peripheral nerves were published by G. Ged together with Sherren in 1905 and Riversy in 1908. Results of experience showed that deep sensitivity at disturbance of integrity of a nerve does not suffer from the very beginning. Superficial sensitivity at first entirely drops out in the zone defined for each nerve, then protopathic sensitivity is recovered: there is possible distinguishing high (higher than 37 °) and low (lower than 26 °) temperatures, the patient feels also pricks, and is raised reacts to the irritation, extremely unpleasant, diffusion, long keeping (hyperpathia). Considerably later (in a year) sensitivity to a touch, temperature between 26 and 37 ° is returned, mistakes in localization of irritation disappear, character of pain is normalized. The complete recovery of sensitivity occurs within two years. Ged did not speak finally whether there corresponds to functional dissociation of sensitivity anatomic.
See also Sensitivity .
Bibliography: K. M. O bulls disorder of thermal sensitivity, M., 1947; About r e of l and L. A. Lectures on physiology of a nervous system, page 50, M. — L., 1935; Head H. Rivers W. Studies in neurology, L., 1920; Rivers W. Head H. A human experiment in nerve division, Brain, v. 31, 1908; Sherren J. The Erasmus Wilson’s lectures on the distribution and recovery of peripheral nerves studied from instances of division in man, Lancet^. 170, p. 727, 886, 1906.
L. G. Chlenov.