Cerebral Cortex, Limbic System, Clinical Assessment of Brain Function Flashcards
primary motor cortex is the site of:
motor activation
secondary motor cortex (premotor) is the site of:
motor conception and organization
function of primary motor cortex
contains neurons to activate each muscle group organized somatotopically
function of secondary motor cortex
initiates complex voluntary acts, contains several specialized areas for speech, eye movements, etc.
the secondary motor cortex solicits information from:
basal ganglia and cerebellum
the major descending pathway of the motor cortex is the
pyramidal/corticospinal tract
what does the pyramidal/corticospinal tract carry?
carries commands from primary motor cortex to motor neurons of brainstem (corticobulbar) and spinal cord (corticospinal)
precentral gyrus is also known as
primary motor cortex
postcentral gyrus is also known as
primary somatosensory
primary motor cortex (precentral gyrus) is Broadmann area
4
primary motor cortex receives info from:
motor thalamus
what is the source of the pyramidal/corticospinal tract
primary motor cortex (precentral gyrus)
primary somatosensory (postcentral gyrus) receives from
somatosensory thalamus (VPL, VPM)
primary auditory (superior temporal gyrus) receives from
medial geniculate nucleus
primary visual (calcarine sulcus) receives from
lateral geniculate nucleus
primary olfactory area receives from
olfactory bulb and other olfactory structures
primary visual (calcarine sulcus) is Broadmann area
17
primary olfactory is broadmann area(s)
25 (orbital) and 28 (parahippocampal gyrus)
premotor is broadmann area(s)
6, 8
premotor cortex sends to:
basal ganglia, cerebellum, primary motor cortex
secondary somatosensory is broadmann area(s)
5, 7
secondary somatosensory receives from:
primary somatosensory cortex
secondary auditory is broadmann area(s)
42, 22
secondary auditory receives from:
primary auditory cortex
