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Descertding Motor Pathways

NEUROPHYSIOLOGY

longitudinal bundles branrh upon enlering basis pontis and rejoin lo enter pyramids ot mcdulla

Literał aspect of cerehral rortex lo show topographic projec tion of motor centcrs on precontral gyrus

Figurę 2.20 Corticospinai Tracts

The corticospinai, or pyramidal, traci is the major motor tract that Controls voluntary movement ot the skeletal muscles, cspedally skilled movemenls of dislal musdes of ihe limbs. Ali structures from the cerehral cortex to the anterior horn colls in the spinał cord consti-lute ihe upper porlion of the system lupper motor neuron). The anterior horn cells and their associated axons constitute the lower por-tion of the system (lower motor neuron).

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