Developmental expression of penile reflexes and copulatory behavior in male rats.
Exp Anim
; 52(2): 153-7, 2003 Apr.
Article
em En
| MEDLINE
| ID: mdl-12806890
ABSTRACT
First, pubertal development of the penile reflexes, e.g., erections, cups and flips in Wistar-Imamichi male rats was investigated following sheath retraction. Second, the penile reflexes and copulatory behavior in the above males were compared between 10 and 44 weeks of age. The penile reflexes in Wistar-Imamichi rats began to appear from day 26, and all males displayed full components of the reflexes on day 47. The occurrence rates and mean numbers of erections, cups and flips in aged adults were significantly low, compared with the young adults. Also, in the observation of copulatory behavior the occurrence rate of ejaculations, and mean numbers of intromissions and ejaculations in aged adults were significantly lower than that in young adults. These results of the present study may suggest that the decrease of copulatory behavior in male rats with age results from the dysfunction of the penile reflexes with age.
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Base de dados:
MEDLINE
Assunto principal:
Pênis
/
Comportamento Sexual Animal
/
Copulação
Limite:
Animals
/
Pregnancy
Idioma:
En
Ano de publicação:
2003
Tipo de documento:
Article