Environmentally induced changes in the dimensions of the rat cerebrum: A replication and extension

Developmental Psychobiology - Tập 6 Số 1 - Trang 3-7 - 1973
Roger Walsh1, Robert A. Cummins1, O. E. Budtz‐Olsen1
1Department of Physiology, University of Queensland, St. Lucia, Brisbane, Queensland, 4067, Australia

Tóm tắt

AbstractIn previous reports exposure to 80 or 90 days of environmental complexity induced a significant increase in the length of the rat cerebrum, whereas 30 days' exposure induced changes which failed to reach significant levels. In the present study after 30 days of differential rearing, cerebral length was 1.2% (p < .005) greater in brains from the enriched animals; the region contributing to this increase lay between the anterior pole and the point of greatest cerebral width. Measurements of cerebral width and brain weight failed to show any significant change, but the body and adrenal weights of the isolated rats were 19.9% (p ≤ .02) greater, respectively, than those of their littermates reared in environmental complexity. However, the ratios of adrenal weight to body weight did not differ significantly between groups.

Từ khóa


Tài liệu tham khảo

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Thông tin xuất bản

Developmental Psychobiology

Tập 6 Số 1

3-7

Thông tin tác giả