The corpora quadrigemina, cerebral peduncles, and cerebral aqueduct are all parts of the

A) midbrain.
B) diencephalon.
C) medulla oblongata.
D) thalamus.
E) pons.

Corpora Quadrigemina

A structure in the midbrain comprising four colliculi (two superior and two inferior) that are involved in visual and auditory processes.

Cerebral Aqueduct

A narrow channel located in the midbrain that connects the third and fourth ventricles of the brain, allowing the flow of cerebrospinal fluid.

Cerebral Peduncles

Structures located at the base of the brain, containing nerve tracts that connect the cerebrum with the brainstem, cerebellum, and spinal cord.