head and neck ch 8

Question 1

Telencephalon

Answer 1

cerebrum, divided into cerebral hemispheres with

Question 2

diencephalon

Answer 2

thalamus & hypothalamus, It is considered the most rostral part of brainstem

Question 3

mesencephalon

Answer 3

midbrain, first part of brainstem. Located at junction of middle and posterior cranial fossae

Question 4

metencephalon

Answer 4

cerebeullum and pons,

Question 5

myelencephalon

Answer 5

medulla oblongata, caudal most part of brainstem. Ends at foramen magnum

Question 6

what 2 pairs of arteries supply the brain and form the cerebral arterial circle?

Answer 6

vertebral arteries and internal carotid arteries

Question 7

which 2 form the basilar artery?

Answer 7

vertebral arteries

Question 8

Vertebral arteries

Answer 8

from 1st part of subclavian. Pass transverse foramen of first 6 cervical vert. then enter foramen magnum

Question 9

anterior spinal artery

Answer 9

branches from both sides join and travel down the anterior median fissure of spinal cord

Question 10

posterior spinal artery

Answer 10

branches from both sides and passes posteriorly around medulla

Question 11

posterior inferior cerebellar artery

Answer 11

just before the 2 vertebral arteries they give this off.

Question 12

basilar branches ( caudal to rostrum)

Answer 12

anterior inferior cerebellar a. pontine a. superior cerebellar a.

Question 13

basilar a. bifurcates into what?

Answer 13

2 posterior cerebral arteries.

Question 14

Internal carotid arteries

Answer 14

Enter skull via carotid canal. Gives off ophthalmic a, posterior communicating a., middle cerebral a., and anterior cerebral a.

Question 15

what connects the internal carotid aa to the cerebral circle?

Answer 15

posterior communicating aa

Question 16

what connects the 2 anterior cerebral aa of the cerebral circle?

Answer 16

anterior communicating a.

Question 17

what CN is the only one that doesn’t originate from the brain?

Answer 17

accessory nerve

Question 18

innervation of the 6 pharyngeal arches

Answer 18

1. trigeminal n.
2. facial n.
3. glossopharyngeal n.
4. superior laryngeal branch of the vagus n.
5. none
   6 recurrent laryngeal branch of the vagus nerve

Question 19

olfactory nerve

Answer 19

SA for smell, sensory receptors are in roof and upper parts of nasal cavity and pass through cribriform plate of ethmoid bone. They terminate by synapsing with secondary neurons in olfactory bulbs

Question 20

parotid gland

Answer 20

largest of three glands, Covers part of the sternocleidomastoid muscle

Question 21

parotid duct pathway

Answer 21

crosses medial border of masseter and then pierces the buccinators muscle before opening near the 2nd maxillary molar