As motor tracts descend to the brainstem,they become the anterolateral surfaces of the midbrain known as the
A)inferior colliculi.
B)accessory nerves.
C)inferior olives.
D)cerebral peduncles.
E)substantia nigra.

Question

Quizplus · Accepted Answer

The anterolateral surfaces of the midbrain are known as cerebral peduncles and contain descending motor tracts that are responsible for fine motor movements of the limbs and trunk. The inferior colliculi are located on the posterior (dorsal) aspect of the midbrain and are involved in auditory processing. The accessory nerves exit the brainstem at the level of the medulla oblongata and are involved in shoulder movement and head rotation. The inferior olives are located on the posterior aspect of the medulla oblongata and are involved in motor learning and coordination. The substantia nigra is located in the midbrain and is involved in movement control and regulation.

As Motor Tracts Descend to the Brainstem,they Become the Anterolateral