Extrapyramidal system

Last revised by Henry Knipe on 14 Oct 2013

The extrapyramidal system is the part of the motor system involved in modulation and regulation of movement. As its name suggests, it is distinct from the motor fibers that are relayed through the pyramids of the medulla oblongata (corticospinal and corticobulbar tracts).

It is composed of nerve cells, nerve tracts and pathways that connect the cerebral cortex, basal ganglia, thalamus, cerebellum, reticular formation, and spinal neurons. Brainstem nuclei of the extrapyramical system include the red nucleus and substantia nigra.

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Cases and figures

  • Brainstem nuclei and their connections - Gray's anatomy illustration
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  • Midbrain (axial)
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