PATHOLOGY

Detailed explanation-1: -The brainstem is the structure that connects the cerebrum of the brain to the spinal cord and cerebellum. It is composed of three sections in descending order: the midbrain, pons, and medulla oblongata.

Detailed explanation-2: -There are three main parts of the midbrain-the colliculi, the tegmentum, and the cerebral peduncles. Of the 12 cranial nerves, two thread directly from the midbrain-the oculomotor and trochlear nerves, responsible for eye and eyelid movement.

Detailed explanation-3: -There are three main parts of the hindbrain-pons, cerebellum, and medulla oblongata. Most of the 12 cranial nerves are found in the hindbrain.