Neuro 5

Question 1

Through what pathways does the pupillary light reflex pass? What nucleus does it skip?

Answer 1

1) Pretectal
2) Edinger-Westfall
3) Cilliary ganglion
4) It skips Lateral Geniculate Nucleus

Question 2

What does an afferent lesion in the pupillary reflex pathway produce? An efferent?

Answer 2

1) Constriction of both pupils when light is shined into the unaffected eye
2) The affected side is unable to contract no matter what (CN-3)

Question 3

Which CN nuclei are medial?

Answer 3

CN 3, 6, 12

Question 4

Which CN nuclei are found in the Medulla? Pons? Midbrain?

Answer 4

1) 9, 10, 12
2) 5-8
3) 3-4

Question 5

Which nerves travel through the cavernous sinus?

Answer 5

CN 3, 4, 5 (V1/2), and 6

Question 6

What are 3 general scenarios that can produce lesions in the cavernous sinus?

Answer 6

1) Infections in the “danger zone” drainage area of the face
2) Infarcts of the internal carotid
3) Pituitary adenomas

Question 7

What information does the Vagal nucleus Solitarius receive/send? Ambiguus? Dorsal Motor?

Answer 7

1) Sensory (visceral taste baroreceptors, gut distension)
2) Motor (oral cavity)
3) Parasympathetic motor to heart, lungs, and upper GI