Explore BrainMass
Share

The Cerebral Cortex and the Motor Cortex

This content was STOLEN from BrainMass.com - View the original, and get the already-completed solution here!

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?

© BrainMass Inc. brainmass.com October 25, 2018, 12:50 am ad1c9bdddf
https://brainmass.com/psychology/motor-cortex/cerebral-motor-cortex-movement-behavior-242375

Solution Preview

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.

$2.19
See Also This Related BrainMass Solution

Cerebral Cortex & Evolution of the Motor Cortex

What regions in the cerebral cortex are known to be involved in movement? How do these areas contribute to the production of motor behavior?

Located at approximately mid-brain and at the very back of the temporal lobe is the motor cortex, which is the area of the cerebral cortex that controls voluntary movements (Dubuc, 2008). Within the motor cortex are two sections that work together and separately to create fluid and complete movements. These sections consist of the primary motor cortex (area 4) and the supplementary motor area (SMA or area 6) (Dubuc, 2008). The primary motor cortex of the brain contributes to voluntary movement through generating signals to the opposite side of the body, letting the muscles know that it is time to move (Brain Connection, 2009). Since this action is simple, this area of the brain is considered a part of lower evolution, in that it evolved early in the species. The supplementary motor area is an area that is more involved in understanding spatial awareness, learned movements, and calculating strength and force to move an object. Since these actions are more complicated than simply moving a part of the body, this section of the brain is considered more advanced in that it evolved later in the species.

Do you know when we found that it was evolved? Or could it just be a section that we didn't know about because we didn't have the capability to find it early on? Are there other sections of the brain with this case of evolving?

View Full Posting Details