FSG 4 Flashcards Preview

7303 Neuroanatomy > FSG 4 > Flashcards

Flashcards in FSG 4 Deck (25):
1

functions of inferior medulla

- MLF coordinates eye and head movements
- connect SC to contralateral CC
- CN V fibers transmit pain and temperature info (synapse in caudal medulla)

2

functions of superior medulla

- regulate head and eye movements and postural activity
- coordinate cardiovascular control, breathing, head movements, and swallowing

3

What's in the inferior medulla?

- central canals
- pyramids
- olive
- pyramidal decussation
- STT
- DCML synapse
- CNs
- MLF

4

What's in the superior medulla?

- 4th ventricle
- CN nuclei clustered dorsally
- nucleus ambiguus
- pontomedullary junction
- ION

5

Which CN nuclei are clustered in the superior medulla (dorsally)

- hypoglossal
- dorsal motor of x
- solitary nucleus
- vestibular nuclei

6

What does the nucleus ambiguus do?

contributes to motor for
- pharynx
- larynx
- esophagus

7

Where is the central canal?

lower medulla, continuous with SC

8

Where is the 3rd ventricle?

junction between midbrain and pons

9

Where is the 4th ventricle?

upper medulla

10

What are the primary medullary functions?

- CV control
- breathing
- head movement
- swallowing
- eye and head movements
- some reflex circuits

11

What is in the anterior pons?

- descending tracts
- pontine nuclei
- pontocerebellar axons

12

anterior pons: descending tracts

- CST
- corticobrainstem
- corticopontine

13

What is in the posterior pons?

- sensory tracts
- RF
- autonomic pathways
- MLF
- CN nuclei 5-7

14

How does the pons connect to the cerebellum?

via pontocerebellar fibers via middle cerebellar peduncle

15

What are the 3 major parts of the midbrain?

- basis pedunculi
- midbrain tegmentum
- midbrain tectum

16

What is in the basis pedunculi?

- cerebral peduncles
- SN

17

Functions of the basis pedunculi

acts as a pathway for descending tracts from the CC via the cerebral peduncles

18

What structures are in the midbrain tegmentum?

- vertical sensory tracts
- superior cerebellar peduncle
- red nucleus
- PPN
- CN III and IV nuclei

19

Red nucleus receives info from these places

- contralateral cerebellum
- CC

20

What does the midbrain tegmentum do?

- supplies efferents to extraocular muscles and pupillary sphincter/ciliary muscles
- regulates muscle tone

21

function of periaqueductal gray

acts to suppress pain and initiate fight or flight response

22

What is in the midbrain tectum?

- pretectal area
- colliculi

23

functions of pretectal area

- reflexive eye and head movements
- 3 eye reflexes

24

functions of colliculi

relay auditory info

25

Where is the periaqueductal gray?

surrounding the cerebral aqueduct in the midbrain tegmentum