Neuroscience Bite: The Premotor Cortex
The Premotor Cortex is another key motor planning region in the brain. It works in conjunction with the SMA to plan and execute movements but is specialized as is the SMA. Specifically, the Premotor Cortex seems to play a key role in encoding the direction of intended movements. Further, the Premotor Cortex seems to play a greater role in externally generated movements. The PMC also seems to play a role in controlling movements of the trunk and the parts of the body closer to the midline.
The Supplementary Motor Area is a key motor planning region in the brain. It is where movements are planned and then sent to the Primary Motor Cortex for execution. It plays a key role in movement sequencing and the generation of internally generated movements. It is also thought to be more focused on controlling the extremities of our body - especially the hands.
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