cerebral cortex contains grey matter.
It consists of sulci and gyrus which increases the surface area of the brain.
Brodman's area:-
area 4-primary motor area(imitate movement)
area 6:pre motor area -co-ordinates action imitate by area4, its alsonarea for skilled movement.
aea 8:frontal area-visual motor area,conjugate movement of eye.
area 44:broca's area/-vocalisation,controlling movement of lip,tongue,larynx and respiratory muscles.
area 9,10,11,12,13;-prefrontal area-intelligence personality,reasoning and judgement.
Motor aphasia:-damage to broca's area:-the inability to speak or to organize the muscular movements of speech. — called also aphemia, Broca's aphasia.
parietal lobe:-
area 3,1,2:-primary sensory area -present in post central gyrus.
area 5,,7:-sensory association area-store memory of past experience.
occipital lobe:-
area 17:-primary visual area-concerned with processing visual information.
area 18,19: visual association area -concerned with interpretation of visual information.
temporal:-
area 41,42:primary auditory area-perception of auditory information.
area 22:auditory association area-interpretation of auditory information
sensory homunculus:-
representation of body parts in cerebral cortex
-representation is upside down, and contralateral
motor homunculus:-
representation of body parts in the cerebral cortex.
representation is upside down.
representation is contralateral.
-representation is directly proportional to functional importance and activity of the area.
hands,finger,lips & tongue which skilled movements have greater area of representation compared to trunk
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