Arteries (M1)

Question 1

external carotid artery function

Answer 1

supply blood to face and neck

Question 2

6 branches of the external carotid artery

Answer 2

1. superior thyroid artery
2. ascending pharyngeal artery
3. lingual artery
4. facial arty
5. occipital arty
6. posterior auricular artery

Question 3

2 terminal branches of the external carotid artery

Answer 3

1. maxillary branch
2. superficial temporal artery

Question 4

facial artery location

Answer 4

starts at lower jaw area and goes up side of mouth towards nose.
anastamoses with dorsonasal artery

Question 5

what does the angular branch of the facial artery supply

Answer 5

medial portion of LL and nasolacrimal apparatus

Question 6

location of maxillary branch of external carotid artery

Answer 6

branches off external carotid artery.
infraorbital branch supplies LL and nasolacrimal apparatus

Question 7

internal carotid artery function

Answer 7

supply blood to most of anterior portion of the cerebrum

Question 8

4 sections of internal carotid artery

Answer 8

1. cervical: runs up in the neck
2. petrous: enters skull through carotid canal, ascends short distance, curves anteriorly and medially
3. cavernous: enters cavernous sinus, goes forward along medial wall beside sphenoid bone, exits roof of sinus b/t CNII and CNIII
4. cerebral: exits cavernous sinus and gives off terminal cerebral branches

Question 9

10 branches of internal carotid artery

Answer 9

1. caroticotympatic artery
2. vidian artery
3. meningohypophyseal trunk
4. inferolateral trunk
5. ophthalmic artery
6. superior hypophyseal artery
7. posterior communicating artery
8. anterior choroidal artery
9. anterior cerebral artery (terminal branch)
10. middle cerebral artery (terminal branch)

Question 10

ophthalmic artery function

Answer 10

main blood supply to globe and adnexa
*first major branch off cerebral portion of internal carotid artery

Question 11

ophthalmic artery course

Answer 11

travels anteriorly ->
enters orbit via optic canal within dural sheath of ON ->
emerges from dural sheath of ON ->
courses inferolateral to the ON ->
crosses above or below ON ->
travels medially ->
travels anteriorly b/t MR and SO to give off terminal branches

Question 12

9 branches of ophthalmic artery

Answer 12

1. lacrimal artery
2. medial palpebral arteries (2)
3. muscular arteries (2)
4. ciliary arteries (2)
5. central retinal artery
6. ethmoid arteries (2)
7. supraorbital artery
8. supratrochlear artery (terminal branch)
   9 dorsonasal artery (terminal branch)

Question 13

lacrimal artery course

Answer 13

enters orbit ->
branches from ophthalmic artery ->
courses anteriorly along upper border of lateral rectus ->
supplies lacrimal gland ->
pierces orbital septum ->
enter UL&LL as lateral palpebral arteries ->
anastomose w/ medial palpebral arteries ->
form palpebral arcades ->
supply eyelids and palpebral & forniceal conjunctiva

Question 14

medial palpebral arteries course

Answer 14

enter orbit ->
branch from ophthalmic artery ->
pierce orbital septum ->
enter UL&LL ->
anastomose w/ lateral palpebral arteries ->
form palpebral arcades

Question 15

marginal palpebral arcade location and function

Answer 15

location: anterior to tarsal plate
function: supply UL&LL near eyelid margin; supply cornea when eyelids are protracted (closed)

Question 16

peripheral palpebral arcade location and function

Answer 16

location: anterior to tarsal (muller’s) muscle
function: supplies UL&LL near peripheral edge of tarsal plate