Brain, Blood Supply, And Cranial Meninges Flashcards Preview

Anatomy BLOCK 3 > Brain, Blood Supply, And Cranial Meninges > Flashcards

Flashcards in Brain, Blood Supply, And Cranial Meninges Deck (98)
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1

What makes up the brain stem?

-medulla oblongata
-pons
-midbrain

2

What are the parts of the brain?

-brainstem
-cerebellum
-diencephalon
-telencephalon (cerebral hemispheres)

3

What are the parts of the diencephalon

Thalamus
Hypothalamus

4

What are the parts of the medulla?

-anterior median fissure
-pyramids
-olive
-pre-olivary sulcus
-retro-livery sulcus
-medullopontine sulcus

5

Anterior median fissure of the medulla

Continuous inferiorly with anterior median fissure of spinal cord

6

Pyramids of medulla

Two longitudinal columns ( one on each side of the anterior median fissure)

7

Olive of the medulla

Oval elevation lateral to upper part of pyramid

8

Pre-olivary sulcus of the medulla

Located between the pyramid and the olive
Attachments of rootlets of hypoglossal nerve (CN XII)

9

Retro-olivary sulcus of the medulla

-located posterior to olive
-attachment of rootlets of glossopharyngeal (CN IX) and vagus (CN X) nerves (in line with attachment of rootlets of accessory nerve/CN XI)

10

Medullopontine sulcus of the medulla

Nerves that attaché (from medial to lateral)
-abducens (CN VI)
-facial nerve (CNVII)
-vestibulocochlear (CN VIII)

11

Pons

-trigeminal nerve (CN V) attaches to anterior surface of pons

12

Midbrain

cerebral crura (cerebral peduncles)
-two columns of descending fibers (one on each side)
Occulomotor nerve (CN III) attaches to medial border of cerebral crus

13

4th ventricle

-posterior surface of brainstem
-cavity between cerebullum (posteriorly) and pons and upper medulla (anteriorly)

14

When can the posterior surface of the brainstem be viewed completely?

When cerebellum is removed by cutting 3 pairs of cerebellar peduncles (superior, middle, and inferior) that connect cerebellum to brainstem

15

What is the posterior surface of the lower medulla similar to?

Posterior surface of cervical and upper thoracic spinal cord

16

Posterior surface of upper medulla and posterior surface of pons form what?

The floor of 4th ventricle, called the rhomboid fossa

17

What are the elevations of the posterior surface of midbrain?

Two superior colliculi
-part of visual system
Two inferior colliculi
-part of the auditory system

18

What is the only cranial nerve attaches to posterior surface of brainstem?

Trochlear nerve (CN IV)
-emerges immediately below inferior colliculus

19

What are the right and left cerebral hemispheres separated by?

Longitudinal fissure
-separation is incomplete
-at bottom of longitudinal fissure, there is a large bundle of fibers (corpus callosum) that connects right and left hemispheres

20

How many lobes does each hemisphere have?

5

21

What are the lobes that each hemisphere contains?

-frontal
-parietal
-temporal
-occipital
-insular

22

Which lobe is hidden in the lateral sulcus?

Insular

23

What separates the frontal and parietal lobes?

Central sulcus

24

What separates the temporal lobe from frontal and parietal lobe?

Lateral sulcus

25

What two arteries provided the arteries last supply of the brain?

-vertebral arteries
-internal carotid arteries

26

What part of the subclavian does the vertebral artery come off of?

1st branch

27

Where does the vertebral artery enter the cranial cavity?

Foramen magnum

28

Where do the right and left vertebral arteries join each other?

At medullopontine sulcus to form basilar artery

29

How does the basilar artery run?

Along midline of anterior surface of pons and ends at upper end of pons by dividing into right and left posterior cerebral arteries (terminal branch)

30

What do the vertebral and basilar branches supply?

-spinal cord
-brainstem
-cerebellum
-posterior parts of cerebral hemispheres
(Essentially entire brainstem and occipital lobe)