WET BRAIN

Question 1

What artery supplies the cuneate and gracile nuclei and tracts?

Answer 1

posterior spinal artery

Question 2

What is the internal arcuate tract?

Answer 2

where second order TVP neurons cross in the medulla to form the medial lemniscus

Question 3

What artery supplies the medial lemniscus in the medulla? In the pons? In the midbrain?

Answer 3

anterior spinal artery
basilar artery
posterior cerebral/superior cerebellar artery

Question 4

Damage to the medial lemniscus cause below the medulla? Above the medulla?

Answer 4

ipsilateral loss of TVP; contralateral loss of TVP

**decussation occurs at the medulla

Question 5

What artery supplies the ALS in the medulla? In the pons? In the midbrain?

Answer 5

vertebral artery
basilar artery
PCA/SCA

Question 6

What will damage to ALS cause at the level of the lesion? Below the lesion?

Answer 6

IPSIlateral loss of P & T from body at the site of the lesion; CONTRAlateral loss of P & T from body below lesion

Question 7

Where do second order neurons synapse in TTT?

Answer 7

in the pons

Question 8

What will damage to TTT below the pons cause? What about damage to TTT above the pons?

Answer 8

ipsilateral loss of P & T and TVP below; contra above

Question 9

What artery supplies TTT in the medulla? Pons? Midbrain?

Answer 9

anterior spinal artery
basilar artery
PCA/SCA

Question 10

What artery supplies the MLF in the medulla? In the pons/midbrain?

Answer 10

anterior spinal artery

basilar

Question 11

What artery supplies the lateral corticospinal tract in the medulla? Pons? Midbrain?

Answer 11

anterior spinal artery
basilar
PCA/SCA

Question 12

Where do the corticospinal tracts cross?

Answer 12

at the medullary pyramids

*deficits above pyramids will cause contralateral motor deficits vs ipsi below the pyramids will cause ipsi motor deficits

Question 13

What artery supplies the spinal 5 nucleus in the medulla? Pons?

Answer 13

PICA; AICA

Question 14

What is the function of the spinal 5 nucleus?

Answer 14

GSA pain, temp, TVP from face

*CN 5, 7, 9, 10

Question 15

What artery supplies the inferior salivatory nucleus?

Answer 15

vertebral

Question 16

What does the inferior salivatory nucleus do?

Answer 16

provides GVE to the parotid gland

*sends off parasympathetic fibers that synapse in the otic ganglion and continue on to the parotid gland

Question 17

What artery supplies the nucleus ambiguus? What will damage to this nucleus cause?

Answer 17

vertebral artery; swallowing and speaking deficits

Question 18

What artery supplies the nucleus solitarius?

Answer 18

PICA

Question 19

What does nucleus solitarius do?

Answer 19

receives GVA/SVA taste from anterior 2/3, posterior 1/3, and epiglottis; receives baro/chemo reflex for thoracic/abdominal organs

Question 20

What artery supplies the DMX nucleus? Where in the brainstem is this nucleus found?

Answer 20

PICA; mid-medulla

Question 21

Where are the vestibular and cochlear nuclei found in the brainstem? What structure do they surround?

Answer 21

rostral medulla; inferior cerebellar peduncle

Question 22

What artery supplies the vestibular and cochlear nuclei?

Answer 22

PICA (medulla)

AICA (pons)

Question 23

What will damage to the vestibular/cochlear nuclei cause?

Answer 23

contra nystagmus; ipsi hearing loss

Question 24

What does the superior salivatory nucleus do?

Answer 24

supplies GVE to the submandibular, sublingual, and lacrimal glands

Question 25

What does the mesencephalic nucleus of 5 receive? What part of the brainstem is it located in?

Answer 25

unconscious proprioception from face; PONS

Question 26

What does the Edinger Westphal nucleus do?

Answer 26

GVE; supplies parasympathetics to pupil constrictor and ciliary muscle

Question 27

What does spinal 5 do? What nerves does spinal 5 receive input from?

Answer 27

receives crude touch/pain temp from ipsi face; nerves 5, 7, 9, and 10 project to spinal 5