NROC69H3 Lecture Notes - Lecture 8: Picrotoxin, Catecholamine, Saccade
Document Summary
Neocortex: constitutes the top 2mm thick layer of cerebral hemisphere, newest addition to cerebral cortex, older additions, archicortex -- hippocampus, paleocortex -- olfactory cortex, presence of neocortex distinguishes mammals from vertebrates. Intelligence: more folds, gyri, sulci, increased surface area for information representation, decrease distance that axons would have to travel for communication, better defined temporal lobe, larger frontal lobe, executive control. Topographical organization: penfield, mapping of motor and somatosensory homunculi, non proportional mapping of body part, contralateral muscle contractions from stimulation of motor cortex. Important for integrating and interpreting information received from the primary cortical areas. Domain specificity theory of working memory: dlfpc implicated in spatial working memory, vmfpc implicated in object working memory. Horizontal laminar organization: division of neocortex into 6 horizontal layers, notable differences in the thickness of each layer, notable differences between different cortical regions, visual cortex, prominent layer 4, motor cortex, thick layer 6.
