The midbrain a. Is largely in the middle cranial fossab. Is supplied by the anterior inferior cerebellar arteryc. Lies between pons and upper spinal cordd. Contains the oculomotor nucleie. Contains the trigeminal nuclei

The midbrain, also known as the mesencephalon, is a small region of the brain that serves as a relay center for visual, auditory, and motor system information. Here are the answers to your statements:

a. False. The midbrain is not largely in the middle cranial fossa. It is located near the center of the brain between the interbrain and the hindbrain.

b. False. The midbrain is not supplied by the anterior inferior cerebellar artery. It is primarily supplied by branches of the basilar artery.

c. False. The midbrain does not lie between the pons and the upper spinal cord. It is located above the pons and below the cerebrum and thalamus.

d. True. The midbrain does contain the oculomotor nuclei. These nuclei are responsible for motor innervation to the muscles of the eye.

e. False. The midbrain does not contain the trigeminal nuclei. These nuclei are found in the pons and medulla of the brainstem.