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extrapyramidal tract

a motor portion of the central nervous system that includes the basal ganglia and some closely related structures (e.g., the subthalamic nucleus) and descending pathways to the midbrain. It regulates muscle tone and body posture and coordinates opposing sets of skeletal muscles and movement of their associated skeletal parts. Also called extrapyramidal motor system; extrapyramidal system.

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March 1st 2024