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extrapyramidal system

American  

noun

Anatomy.
  1. the part of the central nervous system, including the descending motor fibers other than those of the pyramidal tract, that regulates muscle tone, posture, and other aspects of body movement.


Etymology

Origin of extrapyramidal system

First recorded in 1960–65

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The pathways of the extrapyramidal system are influenced by subcortical structures.

From Textbooks • Jun. 19, 2013

The extrapyramidal system includes projections from the brain stem and higher centers that influence movement, mostly to maintain balance and posture, as well as to maintain muscle tone.

From Textbooks • Jun. 19, 2013

The basal nuclei, which are important for regulating movement initiated by the CNS, influence the extrapyramidal system as well as its thalamic feedback to the motor cortex.

From Textbooks • Jun. 19, 2013

For example, connections between the secondary motor cortices and the extrapyramidal system modulate spine and cranium movements.

From Textbooks • Jun. 19, 2013

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