NEUROANATOMY

MotorAreas
partoffrontallobe
Oosterior
Primarymotorcortex
precentralgyrus offrontallobe ofeachhemisphere
pyramidalcellsallowskeletalmuscle controlaxonsprojectto spinalcord
somatotopybodyrepresentedspatially in PMC
no overlapbetween muscles in unrelatedmovements
strokewillparalyzebody on oppositesidereflexcontractionstillpossible

Premotor Cortex
plansmovements by selectingsequencing movements complex tasks BAG
coordinatesmovement ofseveralmusclegroupssimultaneously musclememory
controls voluntary actionsdepending on sensoryfeedback
damagetopremotor cortex no instinctivemovementmusclememory

Broca'sArea
region of BA44
presentonly in left hemisphere usually
active in speechpreparation organizemakingsounds that areheard as words

FrontalEyeField
closeto BA 8
voluntary eyemovement



sensoryAreas

Primary somatosensory cortex
postcentralgyrus ofparietallobe
receives introfrom somatosensory proprio
receptors includesspatialdiscrimination

somatosensory association cortex
BA 5 7 many connections toPSC
integrate analyzesomatic inputs temppressure size relationshiptexture ofpartsbased
on priorexperience


VisualAreas
primaryvisualcortex
map ofvisualspace on retina
damage

visualassociation area
interpretsvisualimages basedonpriorexperiencefacialrecognition
damage loss vision loseperceptionabilitytounderstandthings