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Flashcards in Medulla Deck (46)
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1

Where does the corticospinal tract decussate?

ventral medulla

2

Where are the pyramids found in the brainstem?

ventral medulla

3

What three structures are in the ventral medulla?

1. Pyramids
2. Inferior olives
3. Motor decussation

4

What is found in the pyramids of the ventral medulla?

Corticospinal tracts

5

What is found in the inferior olives of the ventral medulla?

inferior olivary complex

6

What is found in the tuberculum cinereum of the ventral medulla?

Spinal nucleus and trigeminal tract

7

What four structures are found in the dorsal medulla?

1. 4th ventricle
2. Fasciculus gracilis
3. Fasciculus cuneatus
4. Inferior cerebella peduncle

8

What is found in the Gracile and Cuneate tubercles of the dorsal medulla?

Nucleus gracilis and Nucleus cuneatus

9

The 4th ventricle portion of the dorsal medulla is called _____ medulla

open (rostral)

10

The central canal portion of the dorsal medulla is called _____ medulla

closed (caudal)

11

What three structures are in the open medulla?

1. Hypoglossal trigone
2. Vagal trigone
3. Lateral recess (vestibular and hearing)

12

Know the locations of the structures of the dorsal medulla (open and closed)

MEMORIZE DAT SHIT

13

What structures are found in the hypoglossal trigone?

hypoglossal nucleus
nucleus prepositus hypoglossi

14

Where is the dorsal motor nucleus of CN X?

Vagal trigone (vagus nerve... CN X)

15

Where does the 4th ventricle become the central canal of the spinal cord?

Obex

16

In what structure is there a hole in the blood brain barrier so the brain can detect toxins in the blood and trigger vomiting?

Area Postrema

17

where is the medulla developed from the 3-vesicle brain?
from the 5-vesicle brain?

3: rhombencephalon
5: myelencephalon

18

what are the boundaries of the medulla?

rostral: post pontine protuberance to 4th ventricle
caudal: foramen magnum (1mm to motor decuss)

19

What is the function of the Hypoglossal nucleus?

Move the tongue
(CN XII)

20

What is the function of the dorsal motor nucleus of X?

Viscera of thorax and adomen
(CN X)

21

What is the function of the Inferior salivatory nucleus?

Innervate parotid gland
(CN IX)

22

What is the function of the Motor Nucleus of IX, X and XI?

IX. Stylopharyngeus muscle
X. Pharynx and larynx (speech / swallowing)
XI. Laryngeal muscles

23

What is the function of the *rostral* Nucelus Solitarius of VII, IX, and X?

VII. Taste - ant. 2/3
IX. Taste - post. 1/3
X. Taste - root of tongue
(Solitarius - eating a donut alone)

24

What is the function of the *caudal* Nucleus Solitarius of X, and IX?

X. Abdominal/thoracic viscera; larynx/pharynx, aortic body/sinus
IX. Carotid sinus/body, pharynx, auditory tube

25

Motor nuclei in the medula is _____ while sensory nuclei is _____

Motor - medial
Sensory - lateral

26

What is the function of the vestibular nucleus of VIII?

Inner ear (vestibular division)

27

What is the function of the cochlear nucleus of VII?

Inner ear (auditory division)

28

What is the function of the spinal trigeminal nucleus of V?

Skin face, forehead, anterior scalp, sinus cavities. ant 2/3 of tongue

29

What is the function of the spinal trigeminal of VII, IX, and X?

VII - skin behind ear
IX - post 1/3 of tonue
X - root of tongue

30

What are the cranial nerves associated with the medulla?

IX, X, XI, XII