Question

which brainstem region contains the spinal accessory nucleus? pons medulla midbrain cerebellum

Explanation:

The spinal accessory nucleus is located in the medulla. The pons contains other cranial nerve nuclei. The midbrain has nuclei related to cranial nerves III and IV. The cerebellum is not part of the brainstem nuclei for the spinal accessory nerve.

Answer:

Medulla