By Dr. Ch. Chouchkov (auth.)
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Extra info for Cutaneous Receptors
Independent of speculations concerning the receptor specifictiy, the elucidation of structural events developed during regeneration is an important factor of the main problem to be clarified. In a series of experiments Boeke (1922) was the first to prove the ability of sensory nerve endings to regenerate. Subsequent studies added to the histological observations on both encapsulated and unencapsulated receptors and they have given the different terms of their re-formation and viability (Kadanoff, 1925; Dijkstra, 1933).
After a complete inhibition of BCHE no reaction product has been observed independent of incubation time (from 15 min to 2 h). The main sites of activity are the Schwann receptor cells. This explain the absence of CHE in the Merkel Tastfleck (Cauna, 1962). Experimental investigations on denervated hair follicles and pacinian corpuscles (Winkelmann, 1962; Chouchkov, 1970a) have shown that the enzyme activity does not change up to 2 weeks after the nerve injury. The later diminution of the reaction product may be explained by the destructive changes of the Schwann receptor cells (Chouchkov, 1970a).
1973) on the free endings of palatal rugae has also shown the highest functional viability of mitochondria even in some "disrupted" ones. In our previous experiments with denervated pacinian corpuscles (Chouchkov, 1969b) the enzyme activity falls down earlier than can be deduced from the electron-microscopical picture of the destroyed mitochondria. The present findings in normal and denervated receptors are evidence against the suggestion of the functional deficiency of mitochondria in the sensory nerve endings, and, on the the contrary, point out their viability.