NPB 100 Lecture Notes - Lecture 12: Superior Temporal Sulcus, Auditory Cortex, Cochlear Nucleus
13 Feb 2018
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Document Summary
Central auditory pathway: crossed and uncrossed pathways, cochlear nuclei, cells have binaural input. Important for sound localization: tonotopic maps at each level of pathway. Human auditory cortex: entire brain can be divided based on cytoarchitectonics (cells types and arrangements(cid:524) in to brodmann"s areas, primary auditory cortex lies within brodmann"s area 4(cid:883) on the superior temporal plane. Nonhuman primate cortex: less like human than with subcortical structures, but still remarkably similar, e. g. A1 on superior temporal plane: ls= lateral sulcus, stg= superior temporal gyrus, sts= superior temporal sulcus. Core, belt, parabelt: core, belt, parabelt hierarchical in connectivity and functionality (macaque brain) Macaque auditory cortex: 3 cochleotopic maps in core region. Core, belt, parabelt: core, belt, parabelt, each consist of multiple fields, providing parallel routes out of core fields to higher areaas, r= rostral, c= caudal, m= media, l= lateral, t= temporal, pb= parabelt. Core connectivity: most direct input from thalamus arrives in core fields.
