section 6: part 1

Question 1

what nerves are involved in the jaw reflex?

Answer 1

the afferent & the efferent tracks of cr. nerve 5

Question 2

if a person has nystagmus bilaterally, what can you assume?

Answer 2

that it is a medial cerebellum problem

Question 3

what cranial nerve nuclei are evident on the basis of the pons?

Answer 3

• vestibulo-cochlear 8
• facial 7
• abducens 6
• trigem 5

Question 4

on which side (ventral or dorsal) do you see the cerebellar puduncles?

Answer 4

the dorsal side

Question 5

what marks the caudal boundary of the pons?

Answer 5

a line across the 4th ventricle at its widest point connecting the two vestibular areas

Question 6

what marks the rostral boundry of the pons?

Answer 6

narrowing of the ventricle into the cerebral aqueduct

Question 7

what is the function of the middle cerebral puduncle?

Answer 7

cortex–>pons–>cerebellum

Question 8

superior cerebellar puduncle function?

Answer 8

axons in the deep cerebellar nuclei–>red nucleus, va/vl of thalamus, reticular formation of the pons

Question 9

what are the 4 deep nuclei of the cerebellum?

Answer 9

• fastigial
• globose
• emboliform
• dentate

Question 10

what type of functions does the pontine reticular formation control?

Answer 10

eye movements
sleep
arousal

Question 11

what 3 nuclei can be seen on an image of the caudal section of pons?

Answer 11

vestibular nuclei
abducens nucleus
facial nucleus

Question 12

what is the facial colliculus?

Answer 12

the genus of the facial nerve (loop of facial nerve axons) that loops over the abducen’s nucleus

Question 13

what does the raphe nucleus do?

Answer 13

it has serotonergic projections throughout the forebraine & it modulates responses of the hypothalamus & cerebral neurons