Question

an upper motor neuron lesion to the spinal accessory and hypoglossal nerve will cause?
ipsilateral head rotation and ipsilateral tongue deviation
contralateral head rotation and ipsilateral tongue deviation
ipsilateral head rotation and contralateral tongue deviation
contralateral head rotation and contralateral tongue deviation

Explanation:

• The spinal accessory nerve (CN XI) innervates the sternocleidomastoid and trapezius muscles. The sternocleidomastoid muscle, when acting alone, rotates the head to the opposite (contralateral) side.
• The hypoglossal nerve (CN XII) innervates the tongue muscles. In an upper motor neuron lesion of the hypoglossal nerve, the tongue deviates to the contralateral side due to the unopposed action of the intact genioglossus muscle on the healthy side.

Answer:

Contralateral head rotation and contralateral tongue deviation