Kolb B, Stewart J
Department of Psychology, University of Lethbridge, Alberta, Canada.
Behav Neurosci. 1995 Apr;109(2):285-94. doi: 10.1037//0735-7044.109.2.285.
The effects of perinatal exposure to testicular hormones were studied in male and female rats given medial prefrontal lesions (PFC) on Postnatal Day 7. Hormonally intact rats with PFC lesions showed recovery of performance of the Morris water task but no recovery on a forelimb reaching task. Recovery was abolished in both males gonadectomized at birth and in females given testosterone at birth. Male rats with PFC lesions showed an increase in pyramidal cell spine density. This was blocked in gonadectomized animals. In contrast, female rats with PFC lesions showed an increase in dendritic arbor. This was reduced by perinatal testosterone. Interference with the gonadal hormonal environment reduced the brain's ability to compensate for the effects of early cortical lesions.
在出生后第7天对雄性和雌性大鼠进行内侧前额叶损伤(PFC),研究围产期暴露于睾丸激素的影响。具有PFC损伤的激素完整大鼠在莫里斯水迷宫任务中的表现有所恢复,但在前肢够物任务中没有恢复。出生时去势的雄性大鼠和出生时给予睾酮的雌性大鼠的恢复均被消除。具有PFC损伤的雄性大鼠锥体细胞棘密度增加。这在去势动物中被阻断。相比之下,具有PFC损伤的雌性大鼠树突分支增加。围产期睾酮使其减少。对性腺激素环境的干扰降低了大脑补偿早期皮质损伤影响的能力。