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paleocortex associated with limbic sys
archicortex hippocampus
neocortex 90% of all cortex, have 6 layers some time during development
pyramidal cells main projection to cortex; big neuron (10 to 70/100 microns), spines on dendrites may be involved in learning
stellate cell interneuron w/short axons, locally acting
cortical layers alternating layers of pyramidal and granule cells
afferents of cortex intra-cortex connections, subcortical areas: thalamus, locus ceruleus (other chemically coded projections)
efferents of cortex subcortical via Layer V. (thalamus, spinal cord, brainstem, basal ganglia- via internal capsule); Cortical- commissural via corpus callosum/ant commissure; association fibers to same hemisphere
significance of cortical columns in some areas (SS/visual cortex), all cells in a vertical column respond best to certain stimulus
primary sensory areas postcentral gyrus (3,1,2), primary auditory cortex (41), primary visual cortex (17)
primary motor areas precentral gyrus (4)
unimodal cell respond to complex input regarding a single type of stimulus (ie.SS OR vision)
what are the 4 types of cortical areas? primary sensory, primary motor, association, limbic
the SS cortex is composed of? postcentral gyrus; unimodal assn cortex in sup parietal lobule (areas 5 and 7)
what is the visual cortex composed of? primary visual cortex (area 17); visual assn cortex (unimodal18 and 19); other visual assn cortex (heteromodal) in temporal and parietal lobes
auditory cortex composed of? (41) primary auditory cortex on transverse temporal gyrus; secondary aud cortex (42)
specific motor areas? premotor area and supplementary motor area(6); primary motor area (4); frontal eye field (8)
language areas? broca's (44/45) inf frontal gyrus; wernickes (22) sup temporal gyrus
dominant hemisphere associated with math skills, logic
non-dominant hemisphere associated with face recogntion, musical ability, spatial tasks
prefrontal cortex associated with emotions, personality, intellect
consciousness areas ascending reticular activating sys (reticular formation); locus ceruleous (pons); intralaminar nuclei of the thalamus
Created by: 2rabbits