Evolution.

Society for Experimental Biology

Date:: 1953

Catalogue details

Licence: Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)

Credit: Evolution. Source: Wellcome Collection.

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432 SOCIAL BEHAVIOUR AND PRIMATE EVOLUTION tion). It is thus evident that this region participates in the control of rage reactions in these widely different types of mammals. It may, therefore, be significant that in man this structure is more prominent than in other Fig. 4. Fig- s- Text-fig. 4. Schematic diagram of amygdala of rabbit (from Johnston, 1922-4). Text-fig. 5. Schematic diagram of amygdala of rhesus monkey, Macaca mulatta (from Johnston, 1922-4). Explanation of symbols to Text-figs. 4-6. ^ Cortico-medial. □ baso-lateral L.o.t. nucleus of lateral olfactory tract. B. basal Cen. central nucleus L. lateral M. medial nucleus. Acc.B. accessory basal. Cor. cortical nucleus. Text-fig. 6. Transverse section of the most highly differentiated region of amygdala of man (from Crosby & Humphrey, 1941). primates, and that in the macaque and man in that order the baso-lateral nuclei have increased in proportion relative to the cortico-medial when compared with the amygdala of the rabbit (Text-figs. 4, 5 and 6). This prominence is a reflexion of a selective enlargement of those nuclei (baso-lateral) of the amygdala with pyriform lobe connexions which