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Quarterly Journal of Experimental Physiology 67.2 pp 281-286
© The Physiological Society 1982
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SENSITIVITY OF TOUCH CORPUSCLES IN VITAMIN A-DEFICIENT RATS

W. C. Hamann 1 and N. B. Lee 2

1 Medical Faculty, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
2 Departments of Physiology, Guy's Hospital Medical School, London SE1 9RT

Fifty percent of a population of thirty weanling rats were fed a vitamin A-deficient diet. The remaining 50% were fed a control diet. In comparison with the control group, the rate of growth started to slow down in the vitamin A-deficient animals around day 33. Single unit recordings were made from sensory nerve fibres supplying slowly adapting type I cutaneous mechano-receptors (touch corpuscles). Touch corpuscles were stimulated repetitively with low force mechanical stimuli. Receptors in vitamin A-deficient animals showed clearly reduced nervous responses compared with receptors in control animals. Most receptors remained responsive even after prolonged repetitive stimulation.

Submitted on June 26, 1981






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Copyright © 1982 by the The Physiological Society.