Abstract
Further understanding of the changes in emotionality and aggression that accompany septal lesions was gained by approaching the problem from a developmental perspective. Large bilateral lesions were placed in the septal region of the four groups of male Wistar rats aged 30, 45, 55, 65 days at the time of surgery. Lesions at 30 and 45 days of age resulted in very transient hyperemotionality whereas sustained hyperemotionality followed similar lesions at 55 and 65 days of age. In an effort to disrupt physiological events associated with puberty, animals were castrated shortly after weaning. Early castration rendered septal lesions ineffective in producing hyperemotionality. Post-pubertal castration failed to alter the disruptive effects of septal lesions. These results are discussed with respect to possible endocrine involvement in changes in emotionality which destruction accompany of septal nuclei.
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