Midbrain HY Flashcards
1
Q
locus ceruleus - location, function?
A
- rostral pons at midbrain junction
- medial
-supplies entire CNS with noradrenergics –> attention, vigilance
2
Q
trochlear nucleus - location, function, lesion?
A
- caudal midbrain
- medial
- only nerve that exits dorsally
-innervates superior oblique (somatic motor)
Lesion:
- no dramatic loss
- may have trouble descending stairs
- may have slight diplopia while reading
3
Q
occulomotor nucleus - location, function, lesion?
A
- rostral midbrain
- medial
-innervates levator palpebrae superioris, inf./sup./medial rectus, inf oblique (somatic motor)
Lesion:
- lateral gaze (MLF)
- ptosis
4
Q
Edinger-Westphal Nucleus - location, functin, lesion?
A
- rostral midbrain
- medial
- parasympathetic preganglionic cells
- innervates sphincter pupillae, ciliary muscle (visceral motor)
Lesion:
-dilated pupil, unresponsive to light
5
Q
substantia nigra
A
- rostral midbrain
- contains dopamine neurons
- lose 80% = Parkinson’s Disease