Details

Autor(en) / Beteiligte

• Díaz-Véliz, Gabriela
• Urresta, Fabio
• Dussaubat, Nelson
• Mora, Sergio

Titel

Progesterone effects on the acquisition of conditioned avoidance responses and other motoric behaviors in intact and ovariectomized rats

Ist Teil von

• Psychoneuroendocrinology, 1994, Vol.19 (4), p.387-394

Ort / Verlag

Oxford: Elsevier Ltd

Erscheinungsjahr

1994

Link zum Volltext

Quelle

Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)

Beschreibungen/Notizen

• This study demonstrates a significant impairment in the acquisition of conditioned avoidance responses in female rats during their estrus phase. Progesterone (PROG 5 mg) injected 6 h prior to the test, signficantly enhanced the performance exhibited by rats at estrus, but not at diestrus. In ovariectomized rats, the acquisition of conditioned avoidance responses was similar to the exhibited during diestrus and this behavior was depressed by a single dose of estradiol benzoate (EB 2 μg) injected 48 h prior to the test. PROG antagonized the avoidance depression induced by EB, but it was not able to induce changes in the acquisition of conditioned avoidance response in ovariectomized rats without EB pretreatment. Estradiol appears to be the principal ovarian steroid modulating the acquisition of an avoidance task, whereas PROG seems to have a secondary role in this behavior, regulating the actions of estradiol on the brain. PROG failed to induce consistent changes in some spontaneous motor behaviors in intact and ovariectomized rats.