Two terms for the massive motor tracts serving voluntary movement are __________ .
A) segmental and nigrostriatal
B) extrapyramidal and rubrospinal
C) pyramidal and corticospinal
D) supplementary and cerebellar-pontine

Question

Quizplus · Accepted Answer

The terms "pyramidal" and "corticospinal" are both synonyms for the massive motor tracts serving voluntary movement. Option A is incorrect because "segmental" refers to the spinal reflex pathways, while "nigrostriatal" is associated with the basal ganglia. Option B is incorrect because "extrapyramidal" refers to all motor pathways that are not part of the corticospinal tract, while "rubrospinal" is a small pathway that arises from the red nucleus. Option D is incorrect because "supplementary" and "cerebellar-pontine" are both involved in motor coordination and planning, but they are not the primary pathways for voluntary movement.

Two Terms for the Massive Motor Tracts Serving Voluntary Movement