Question

the descending spinal tract that decussates within the medulla oblongata is the ________ tract.
lateral corticospinal
reticulospinal
vestibulospinal
anterior corticospinal
rubrospinal

Explanation:

The lateral corticospinal tract is a major descending spinal tract. It originates in the cerebral cortex, travels through the internal capsule, crus cerebri of the midbrain, basilar pons, and then decussates (crosses over) within the medulla oblongata (at the decussation of the pyramids). After decussation, it continues down the spinal cord in the lateral funiculus.
The reticulospinal tract has its origin in the reticular formation and does not decussate in the medulla in the way described for the lateral corticospinal tract.
The vestibulospinal tract originates from the vestibular nuclei and is involved in balance - related motor control and does not decussate in the medulla as per the question's requirement.
The anterior corticospinal tract does not decussate in the medulla. It decussates at the spinal cord level (at the segment where it will synapse with lower motor neurons).
The rubrospinal tract decussates in the midbrain (at the level of the red nucleus) and not in the medulla.

Answer:

lateral corticospinal