Which of the following is NOT true of corticospinal fibers?

A. They may synapse with afferent neurons in ascending pathways.
B. They may synapse directly on gamma motor neurons.
C. They may synapse directly on interneurons.
D. They are collectively sometimes called the extrapyramidal system.
E. They may synapse directly on alpha motor neurons.


Answer: D

Anatomy & Physiology

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