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Motor ouput (Planning output (Involves many areas in the posterior of the…
Motor ouput
Planning output
Involves many areas in the posterior of the frontal lobe
Collects input from
Premotor and supplemental motor cortex (planning)
Premotor cortex
Designs movements, controls axial muscles
Send input to primary motor cortex as well
Supplemental motor cortex
Plans complex bilateral movements
Involved in vocalization
Cerebellum and basal ganglia (subcortical processing)
Parietal cortex (sensory information)
Hypothalamus (motivational factors)
Execution of movement
Primary motor cortex
Controls fine movement
Regulates contractile force of skeletal muscles
Responsible for motor output of groups of muscles
Motor output fibers originate from the "motor homunculus" on surface on cortex
These fibers travel through tracts in spinal cord
Synapse in ventral horn
Corticospinal tracts
Lateral corticospinal tract
Control fine, skilled movements in distal limbs
Ventral corticospinal tract
Control postural and gross movements in trunk and limbs
Cotricobulbar tract
relays motor output to head, eyes, tongue