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Male copulatory behavior and the function of the hypothalamo-hypophysial-gonadal axis in hypothyroid male rats were investigated in the present study. Hypothyroidism was induced by thyroidectomy or thiouracil. In male copulatory behavior test, intromission latencies in hypothyroid rats were significantly longer than those in euthyroid rats and ejaculation frequencies were reduced in hypothyroid male rats compared to control rats without reduction of plasma concentrations of testosterone. These changes in copulatory behavior in hypothyroid male rats were restored to control levels by administration of T4 (5 micrograms/rat). Hypothyroidism decreased adrenal weights, and basal and peak concentrations of corticosterone during diurnal variation, whereas it increased peak concentrations of ACTH in adult male rats. These results indicate that hypothyroidism causes adrenal dysfunction directly and results in hypersecretion of ACTH. The adrenal disturbance observed in hypothyroid rats may affect male copulatory behavior.
A Tohei, and
G Watanabe, and
K Taya
July 1994,
Jikken dobutsu. Experimental animals,
A Tohei, and
G Watanabe, and
K Taya
October 1991,
Jikken dobutsu. Experimental animals,
A Tohei, and
G Watanabe, and
K Taya
January 1988,
Physiology & behavior,
A Tohei, and
G Watanabe, and
K Taya
November 1970,
Physiology & behavior,
A Tohei, and
G Watanabe, and
K Taya
February 1968,
Journal of comparative and physiological psychology,
A Tohei, and
G Watanabe, and
K Taya
February 1972,
European journal of pharmacology,
A Tohei, and
G Watanabe, and
K Taya
August 1967,
Psychopharmacologia,
A Tohei, and
G Watanabe, and
K Taya
July 1991,
Jikken dobutsu. Experimental animals,
A Tohei, and
G Watanabe, and
K Taya
December 1981,
Hormones and behavior,
A Tohei, and
G Watanabe, and
K Taya
June 1984,
Hormones and behavior,
