BUS 17 Lecture Notes - Lecture 15: Papez Circuit, Mammillary Body, Sensory Cortex
Document Summary
Charles darwin (1872): made two important contributions to the field. Cross-species similarities: animal emotions are homologous to human emotions. Separating brain from other organs in animals doesn"t impair emotional behaviour. Bodily changes are often too slow to generate emotions artificial hormonal activation of bodily activity is insufficient to generate emotion. But: this critique has been doubted, too james-lange theory remain influential. The cannon-bard theory: based his theory on emotional behaviour of decorticated cats: these animals showed sudden and inappropriate anger attacks (sham rage) They argued that if emotions = perception of bodily change then emotions need intact sensory and motor cortices. In this theory the hypothalamus is involved in the emotional response to stimuli and these responses are inhibited by evolutionarily more recent neocortex. Removal of cortex freed hypothalamus = sham rage. Papez circuit (1937): scheme for central neural circuitry in emotion. Sensory downstream input to hypothalamus diverges into upstream and.
