5.7 Brainstem Lesions

Question 1

• upper and lower face involved

- lesion of facial nucleus or lower motor neuron

Answer 1

peripheral CN VII lesion

Question 2

• upper motor neuron before the nucleus

- affects only the lower half of the face

Answer 2

central CN VII lesion

Question 3

in CN VII palsy, is tase is affected the lesion is more _________, likely in the _______ lobe

Answer 3

proximal, temporal

Question 4

in CN VII palsy, if taste is unaffected, the lesion is more _________

Answer 4

distal

Question 5

symptoms of a supranuclear lesion causing double vision?

Answer 5

neither eye able to move, UMN deficit

Question 6

symptoms of intranuclear lesion causing double vision?

Answer 6

one eye muscle affected, LMN deficit of medial longitudinal fasciculus

Question 7

symptoms of extranuclear eye dysfunction?

Answer 7

one eye affected, would have multiple deficits (difficulty elevating eye as well as adducting)

Question 8

bulbar nucleus is lesion of ________ and the effect is __________

Answer 8

LMN, unilateral

Question 9

pseudobulbar (above medulla) is an ________ lesion, and the effect is _________

Answer 9

UMN, bilateral

Question 10

lateral medullary syndrome involves:

• right palatal weakness due to CN ___
• right palatal numbness CN____
• right face numbnuess _____
• left body numbness _______
• right Horner’s ______
• vertigo _____
• right sided ataxia _____

Answer 10

• X ambiguus
• IX solitary
• CN V nucleus and tract
• spinothalamic tract
• sympathetic fibers
• vestibular nucleus
• inf cerebellar peduncle