neuroanatomy

Question 1

what is the brainstem

Answer 1

midbrain, pons, medulla

Question 2

role of the midbrain

Answer 2

eye movements and reflex responses to sound and vision

Question 3

what CN emerge from the midbrain

Answer 3

3 and 4

Question 4

what CN emerge from the medulla

Answer 4

9, 10, 11, 12

Question 5

if the medial aspect of the brainstem is damaged what is affected

Answer 5

4 Medial

1) MOTOR - corticospinal tract - contralateral paralysis
2) MEDIAL LONGITUDINAL FASCICULUS- ipsilateral internuclear opthalmoplegia

3) MEDIAL LEMNISCUS
- contralateral loss of vibration/fine touch

4) MOTOR NUCLEI
- ipsilateral cranial nerve palsies

Question 6

if the side of the brainsterm is affected what structures are in danger

Answer 6

4 SIDE

1) SPINOTHALAMIC
- contralateral pain and temperature loss

2) SPINOCEREBELLAR
- ipsilateral ataxia

3) SYMPATHETIC
- ipsilateral horners

4) SENSORY CN V
- ipsilateral sensory loss

Question 7

name the 4 motor nuclei in the midline

Answer 7

CN3 - oculomotor

CN4 - trochlear

CN6 - abucens

CN12 - hyglossal

Question 8

CN emerge from pons

Answer 8

CN 5, 6, 7, 8

Question 9

cerebellopontine angle lesions

Answer 9

acoustic neuroma