Parotid gland secretion is one of the most easily observable manifestations of autonomic activity, and a study of the secretion of this gland should be helpful both in the elaboration of the theory of autonomic activities and perhaps also in practical diagnosis (1, 2, 3). Strongin and Hinsie have shown that whereas normal subjects secrete on the average.07 c.c. per 5-minute period, varying from 02 c.c. to .15 c.c., none of a number of manic-depressive patients studied by them secreted more than .01 c.c. per 5-minute period (4, 5).
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Eysenck et al. (1944) studied this question.
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