PSYC 271 Chapter Notes - Chapter 3: Interthalamic Adhesion, Substantia Nigra, Periaqueductal Gray

• School: Queen's University
• Department: Psychology
• Course: PSYC 271
• Professor: Richard Beninger

Document Summary

Reticular formation, pons: sleep, arousal, attention, movement, muscle tone, reflexes: cardiac, circulatory, ascending and descending tracts of reticular formation. Tectum ( roof ); on dorsal surface: superior colliculi ( hills ) visual, inferior colliculi auditory. Hypothalamus: regulating motivated behaviours (eating, sleeping, sex), by exerting control over pituitary gland. Diencephalon continued: mammillary bodies are a pair of spherical nuclei behind the pituitary. Pituitary gland: controlled by hypothalamus, secretes hormones. Major fissures: fissures: large furrows in the cortex (small furrows are sulci), longitudinal fissure is midsagittal, central and lateral fissures partially divide hemispheres into lobes. Major gyri: gyri are ridges between fissures & sulci, precentral gyrus, postcentral gyrus, superior temporal gyrus, cingulate gyrus. Erebral commissures: corpus callosum: tract connecting the two cerebral hemispheres. Neocortex: six-layered cortex of relatively recent evolution, numbered i to vi starting at surface. The 6 layers of neocortex differ in terms of size and density of cell bodies and proportion of pyramidal : stellate cells.