Final answer:
Another name for CN XI is the spinal accessory nerve, which is a motor nerve important for movements like shoulder shrugging and head turning.
Step-by-step explanation:
The other name for CN XI is the spinal accessory nerve. This nerve is strictly motor, with roles that include innervating the sternocleidomastoid and trapezius muscles to facilitate certain movements like head turning and shoulder shrugging. Within the classification of cranial nerves, certain nerves are responsible for sensory, motor, or both sensory and motor functions.
For example, the facial nerve (CN VII) contains both kinds of fibers and is involved in facial expressions and taste, whereas cranial nerve IX and cranial nerve X also have mixed functions with roles such as controlling salivary glands and visceral responses, respectively.