Which midbrain cells are involved in general light reflexes?

Correct Answer: B

Rationale: The superior colliculus in the midbrain coordinates visual reflexes, including light reflexes (e.g., pupillary response via pretectal nuclei). The red nucleus and substantia nigra are motor-related, and the inferior colliculus processes sound.

Correct Answer: D

Rationale: The facial nerve (CN VII) motor nucleus is in the pons, controlling facial muscles. The midbrain houses CN III/IV nuclei, and the cerebellum coordinates movement.

Correct Answer: D

Rationale: Corneal sensation (via ophthalmic nerve, V1) synapses in the trigeminal ganglion, the sensory root of CN V.

Correct Answer: C

Rationale: The cervical sympathetic trunk lies behind the carotid sheath, ascending along the neck to the superior cervical ganglion.

Correct Answer: D

Rationale: Corneal sensation (V1) synapses in the trigeminal ganglion (option e), the sensory root of CN V.