PSYB57H3 Lecture Notes - Lecture 8: Basilar Membrane, Nigrostriatal Pathway, Solitary Tract
Document Summary
Different points on the basilar membrane and in the cortex represent different sound frequencies. Stimulated the somatosensory cortex in epileptic patients and topographically mapped. Larger area = higher sensitivity: number of homunculi exist in the somatosensory cortex. Balance: located in the inner ear, allows us to perceive our own motion and maintain balance, consists of the: Balance: semicircular canals and otolith organs contain hair cells that bend when we move, vestibular system pathway. Hairs cells project to the 8th cranial nerve to nuclei in the brainstem. Taste buds: sweet, sour, salty, bitter. Receptor surface, the olfactory epithelium, is composed of: receptor hair cells, supporting cells. Cranial nerves 9, 10, and 7 leave the tongue and enter the solitary tract. After the solitary tract two pathways emerge: one route projects to si and sii (in the insular cortex) via the ventral posteriormedial nucleus of the thalamus, one route projects to the amygdala and lateral hypothalamus.
