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The Cerebral Cortex and the Motor Cortex

1. What regions in the cerebral cortex are known to be involved in movement?

2. How do these areas contribute to the production of motor behavior?

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RESPONSE:

1. What regions in the cerebral cortex are known to be involved in movement?

The cerebral cortex is the outer covering of gray matter over the hemispheres. This is typically 2- 3 mm thick. The Neuromotor System is components of the central nervous system (CNS) and peripheral nervous system (PNS) involved in the control of coordinated movement.

Motor cortex is a term that describes regions of the cerebral cortex involved in the planning, control, and execution of voluntary motor functions. Three areas are involved: the primary motor cortex, the lateral premotor area (PLA) and the supplementary motor area (SMA), which have other connections to other parts of the brain as described below:

1. The primary motor cortex (MI; area 4) is in the precentral gyrus. This is the origin of most of the corticospinal tract and a large number of cortical bulbar fibers, particularly those controlling motor cranial nerves. This also has projections to the thalamus and basal ganglion. The VL of the thalamus makes significant input to this nucleus and the ...

Solution Summary

Through discussion and diagram, this solution describes the regions in the cerebral cortex that are known to be involved in movement. It also explains how these areas contribute to the production of motor behavior. Supplemented with an article describing the cerebral cortex.

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