Lecture 10: Brainstem Blood Supply, CN 3-4 Flashcards
1
Q
Be able to label the Circle of Willis
A
2
Q
Label side view of brainstem circulation
A
3
Q
Cranial Nerve III Somatomotor
A
- Midbrain, medial
- LMNs to extraocular muscles except LR and SO
- Levator palpebrae
4
Q
Cranial Nerve III Visceromotor
A
- Edinger-Westphal nucleus
- Preganglionic parasympathetic
- To smooth muscle in eye, pupil constricter, ciliary muscle
- Disruption causes Horner’s Syndrome
5
Q
Where is cranial nerve III? (picture)
A
6
Q
Cranial Nerve III Palsy
A
- Closed eyelid due to disrupted levator palpebrae
- Deviated eye, down and out
- Dilated pupil, absence of parasym from Edinger Westphal
7
Q
What’s in the rostral midbrain?
A
8
Q
Medial Midbrain Syndrome
A
9
Q
Cranial Nerve IV Somatomotor
A
LMN to Superior oblique muscle
10
Q
Where is cranial nerve IV?
A
11
Q
What’s in the caudal midbrain?
A
