BUS 17 Lecture Notes - Lecture 17: Nauta, Limbic Lobe, Rhinencephalon
Document Summary
Most of the medial surface of the human cerebral hemispheres is occupied by the greatly expanded neocortex. At the surface of the brain the central olfactory system and the septum. Hidden within the hemispheres the amygdaloid complex and the hippocampal formation. Their main efferent systems have been drawn out into long, arch-shaped bundles due to the strong development of the neocortex and the related expansion of the temporal lobe. The septum, amygdala, hippocampal formation and their efferent bundles constitute together the ring-shaped, medialmost zone of the hemisphere. Flanked by a second zone which encompasses the cingulate and the parahippocampal gyri. Papez (1937) claimed that a circuit, of which the hippocampal formation and the cingulate gyrus form important components, constitutes the neural substrate of emotional behaviour. Kl ver and bucy demonstrated that, in monkeys, resections of the anterior portions of the temporal lobes have, among other effects, a profound influence on affective responses.
