Cranial Nerves & CN Lesions

Question 1

CN XII - Function

Answer 1

motor n. to all external and intrinsic m. of tongue (“-glossus”) except for the palatoglossus (CNX)

Question 2

CN XII - Lesion

Answer 2

paralysis & atrophy of IPSILATERAL m. of tongue

tongue deviates to side of weakness bc unable to protrude the weak side

Question 3

CN XI - Function

Answer 3

motor n. to SCM and trapezius

Question 4

CN XI - Lesion

Answer 4

weakness in shrugging IPSILATERAL shoulder and turning head to opposite side