Effect of Gonadal Activity on the Cranial Dimorphism of the Rat
作者:
Silvia L. Dahinten,
Héctor M. Pucciarelli,
Felix R. Moreno,
期刊:
Cells Tissues Organs
(Karger Available online 1988)
卷期:
Volume 132,
issue 4
页码: 324-326
ISSN:1422-6405
年代: 1988
DOI:10.1159/000146596
出版商: S. Karger AG
关键词: Sexual dimorphism;GonadaΓactivity;Skull differentiation
数据来源: Karger
摘要:
Weanling rats of both sexes were submitted to either castration, or castration together with periodic injections of testicular extract to males or of ovarian extract to females. Control and experimental animals were sampled at 63 days of age. Cranial differentiation between sexes was estimated by Mahalanobis D2 distances. The controls showed a significant sexual cranial difference. Orchidectomy decreased cranial differences and this effect was compensated by injections of testicular extract. On the other hand, oophorectomy increased cranial differences, which were diminished by injections of ovarian extract. Sexual cranial dimorphism in the normal rat seems to be the result of a counteracting effect between testicular and ovarian hormonal secretions.
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