The corticospinal tract, the corticobulbar tract, and the rubrospinal tract make up the ______________ of descending tracts from the primary motor cortex.
A) lateral group
B) ventromedial group
C) caudal group
D) posteromedial group
E) rostral group

Question

Quizplus · Accepted Answer

The corticospinal tract, corticobulbar tract, and rubrospinal tract are all part of the lateral group of descending tracts from the primary motor cortex. The ventromedial group includes the tectospinal tract, vestibulospinal tract, and reticulospinal tract, while the caudal group includes the hypoglossal, spinal accessory, and accessory nerves. The posteromedial group is not a recognized classification of descending tracts. The rostral group includes the olfactory and optic nerves, which are sensory rather than motor.

The Corticospinal Tract, the Corticobulbar Tract, and the Rubrospinal Tract