Lecture 2: arterial supply and venous drainage Flashcards

1
Q

left common carotid artery is a branch off

A

the aortic arch

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2
Q

right common carotid artery is a branch off

A

the brachiocephalic trunk

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3
Q

the common carotid artery ascends within the neck to the superior border of the

A

thyroid cartilage / C3-C4 vertebral levels

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4
Q

common carotid artery bifurcates into

A

external carotid and internal carotid arteries

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5
Q

common carotid artery ascends medially to the ____ and _____ ascends posteriorly

A
  • internal jugular vein

- vagus nerve

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6
Q

internal carotid artery passes deep to

A

the posterior belly of digastric and stylohyoid muscles

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7
Q

internal carotid artery is crossed by the

A

hypoglossal nerve

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8
Q

internal carotid artery ascends anterior to

A

transverse processes of C1-C3 to reach the bas of the skull

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9
Q

major source of blood to brain and orbit

A

internal carotid artery

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10
Q

4 parts of the internal carotid artery

A
  • cervical
  • petrous
  • cavernous
  • cerebral
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11
Q

cervical part of the internal carotid artery

A

bifurcation of common carotid artery to lower end of the carotid canal

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12
Q

petrous part of the internal carotid artery

A

passes through the carotid canal (in petrous temporal bone)

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13
Q

cavernous part of the internal carotid artery

A

courses through the cavernous sinus (along the body of the sphenoid)

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14
Q

cerebral part of the internal carotid artery

A

after pierced the dura (near anterior clinoid process) the ICA gives off the ophthalmic artery before terminating as the anterior and middle cerebral arteries

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15
Q

ophthalmic artery

A
  • emerges from the internal carotid right after leaving the cavernous sinus
  • enters orbit via optic canal
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16
Q

ophthalmic artery branches

A
  • supraorbital (forehead)
  • supratrochlear (forehead)
  • lacrimal
  • ciliary
  • ehtmoidal
  • muscular
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17
Q

external carotid artery passes deep to

A

posterior belly of digastric and stylohyoid muscles

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18
Q

external carotid artery passes posterior to

A

ramus of the mandible where it is embedded in the parotid gland

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19
Q

external carotid artery main supply

A

structures external to the skull

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20
Q

external carotid artery branches

A
  • superior thyroid artery
  • ascending pharyngeal artery
  • lingual artery
  • facial artery
  • occipital artery
  • posterior auricular artery
  • maxillary artery (terminal branch)
  • superficial temporal artery (terminal branch)

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21
Q

superior thyroid artery

A
  • deep to infrahyoid muscles to reach thyroid
  • gives off branches to local muscles ( infrahyoid muscles and SCM)
  • gives rise to the superior laryngeal artery
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22
Q

superior laryngeal artery

A
  • branch off the superior thyroid artery

- supplies the larynx

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23
Q

ascending pharyngeal artery

A
  • ascends between the internal carotid artery and pharynx to the base of the skull
  • sends branches to the pharynx
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24
Q

lingual artery

A
  • from anteromedial aspect of external carotid
  • crossed by hypoglossal nerve
  • deep to stylohyoid
  • posterior to digastric muscles
  • deep to hyglossus
  • primary blood supply to the tongue and floor of the oral cavity
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25
Q

facial artery

A
  • deep to digastric and stylohyoid muscles and medial to the rams/angle of the mandible
  • gives off the submental artery before entering the face
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26
Q

facial artery branches

A
  • inferior labial artery
  • superior labial artery
  • lateral nasal branch
  • angular artery (terminal branch of the facial artery)
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27
Q

angular artery anastemosis with

A

the ophthalmic artery

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28
Q

occipital artery

A
  • parallel and deep to the posterior belly of digastric as it courses to the posterior scalp
  • has branches that supply the scalp and muscles in the area
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29
Q

posterior auricular artery

A
  • ascends posteriorly between the external acoustic meatus and mastoid process
  • gives branches the posterior auricle and muscles in the area
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30
Q

superficial temporal artery

A
  • terminal branch
  • originates within the parotid gland
  • enters the temporal fossa
  • terminates by dividing into frontal and parietal branches
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31
Q

maxillary artery

A
  • terminal branch
  • arises within the parotid gland
  • passes medial to mandible to enter the infra temporal fossa
  • may pass superficial or deep to lateral pterygoid muslce
  • passes through the pterygomaxillary fissure to enter the pterygopalatine fossa
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32
Q

branches off the 1 part (mandibular) of the maxillary artery

A
  • deep auricular artery
  • anterior tympanic artery
  • middle meningeal artery
  • accessory meningeal artery
  • inferior alveolar artery

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33
Q

deep auricular artery

A

pierces the wall of the external acoustic meatus and supplies the lateral surface of the tympanic membrane

34
Q

anterior tympanic artery

A

transverses the pertrotympanic fissure and supplies the medial surface of the tympanic membrane

35
Q

middle meningeal artery

A

transverses the foramen spinosum to enter the middle cranial cavity, where its blood supply includes the dura mater

36
Q

accessory meningeal artery

A

transverses the foramen ovale to enter the middle cranial cavity; where its blood supply includes the dura mater

37
Q

inferior alveolar artery

A

transverses the mandibular foramen–> enters the mandibular canal; supplies the mandibular teeth and adjacent gingiva

38
Q

inferior alveolar artery branches

A

mylohyoid branch

incisive and mental

39
Q

incisive branch of the inferior alveolar artery

A

courses toward the midline and supplies the anterior teeth and gingiva

40
Q

mental branch of the inferior alveolar artery

A

passes through the mental foramen to supply the muscles of the skin and the chin

41
Q

branches off the 2 part (pterygoid) of the maxillary artery

A
  • messenteric artery
  • deep temporal arteries
  • pterygoid arteries
  • buccal artery

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42
Q

messenteric artery

A

passes superior to the mandibular notch to reach the deep surface of the master muscle (which it supplies)

43
Q

deep temporal arteries

A

ascend to supply the temporal muscle

44
Q

pterygoid arteries

A

supply the pterygoid muscle

45
Q

buccal artery

A

supplies the buccinator muscle

46
Q

branches off the 3 part (pterygopalatine) of the maxillary artery

A
  • posterior superior alveolar artery
  • infraorbital artery
  • descending palatine artery
  • artery of pterygoid canal
  • pharyngeal artery
  • sphenopalatine artery

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47
Q

posterior superior alveolar artery

A

transverses the alveolar foramen; supplies the maxillary molar, premolars, adjacent gingival tissue as well as the lining of the maxillary sinus

48
Q

infraorbital artery

A

passes through the inferior orbital fissure–> infraorbital groove –> infraorbital canal –> infraorbital foramen
-supplies the inferior eyelid, lateral nose and superior lip
gives rise to the anterior alveolar artery
-supply the maxillary sinus

49
Q

anterior alveolar artery

A
  • derived from the infraorbital artery
  • supplies the maxillary canine, incisors and adjacent gingival tissue
  • supply the maxillary sinus
50
Q

descending palatine artery

A

descends through the greater palatine canal –> branches into greater and lesser palatine arteries and pass through the greater and lesser palatine foramina
-supply mucous membrane/ glands of the soft and hard palate and maxillary gingival tissue

51
Q

artery of pterygoid canal

A

passes through the pterygoid canal

-supplies the nasopharynx, pharygotympanic tube and tympanic cavity

52
Q

pharyngeal artery

A

passes through the palatovaginal canal

-supplies the nasopharynx

53
Q

sphenopalatine artery

A

terminal branch of the maxiallary artery

  • passes through the sphenopalatine formate to reach the nasal cavity
  • supplies a portion of the nasal cavity (nasal septum and anterior hard palate)
54
Q

blood from the brain empties into

A

dural venous sinuses

55
Q

emissary veins

A

pass through the openings of the cranial wall
allow communication between veins outside the skull and dural venous sinuses (inside the skull)
-potential for spread of infection

56
Q

diploic veins

A

occupy the channels in the cranial bones

57
Q

dural venous sinuses are

A

endothelial lined spaces between the periosteal and meningeal layers of the dura

58
Q

name 9 of the dural venous sinuses

A
  • superior sagittal sinus
  • inferior sagittal sinus
  • straight sinus
  • occipital sinus
  • transverse sinus
  • sigmoid sinus
  • caverous sinus
  • superior petrosal sinus
  • inferior petrosal sinus
59
Q

superior sagittal sinus

A
  • convex superior attached border of the flax cerebri

- begins near the crita galli and ends near the internal occipital protuberance

60
Q

inferior sagittal sinus

A
  • occupies the concave inferior free border of the flax cerebri
  • ends in the straight sinus
61
Q

straight sinus

A
  • formed by the union of the inferior sagittal sinus and the great cerebral vein
  • joins the confluence of sinuses
  • located at the junction of the flax cerebri and tentorium cerebelli
62
Q

occipital sinus

A

occupies the attached border of the flax cerebri and ends at the confluence of sinuses

63
Q

confluence of sinuses

A

union of the superior sagittal, straight, occipital, and transverse sinuses

64
Q

transverse sinus

A

-passes from the confluence of the sinuses, laterally along the attached margins of the tentorium cerebelli

65
Q

sigmoid sinus

A
  • where the transverse sinus leaves the tentorium cerebelli
  • s shaped as it descends and passes through in the posterior cranial fossa
  • continues as the internal jugular veins (IJV) as it passes the jugular foramen
66
Q

cavernous sinus

A
  • located on either side of the sella turcic of the sphenoid bone
  • drains posterioinferiorly through the superior and inferior periosteal sinuses
67
Q

superior petrosal sinus

A
  • along the anterior margin of the tentorium cerebelli

- passes from the posterior end of the cavernous sinus and terminates when it joins with the transverse sinus

68
Q

inferior petrosal sinus

A

originates at the posterior end of the cavenous sinus, passes inferiorly and empties into the proximal aspect of the IJV

69
Q

structures passing through the cavernous sinus

A
  • internal carotid artery
  • internal carotid plexus (sympathetic nerves)
  • CN 3
  • CN 4
  • CN 6
  • CN V1
  • CN V2

separated from blood in the sinus by endothelial cells

70
Q

superficial temporal vein

A

drains blood from the scalp in the region of the anterior to the auricle
-near the auricle it enters the parotid gland

71
Q

maxillary vein

A
  • short trunk going with the 1st part of the maxillary artery
  • derived from the union of veins of the pterygoid venous plexus
72
Q

pterygoid venous plexus

A

deep network of veins in the infra temporal fossa

73
Q

retromandibular vein

A
  • formed by the union of the superficial temporal vein and the maxillary vein
  • divides into anterior and posterior branches
74
Q

___ and ___ join to form the external jugular vein

A

posterior branch of the retromandibular vein and posterior auricular vein

75
Q

___ and ___ join to form common facial vein which drains into the internal jugular vein

A

anterior branch of the retromandibular vein and facial vein

76
Q

___ and ___ join to form the facial vein

A

supraorbital vein and supratrochlear vein

77
Q

the facial vein communicates with the pterygoid venous plus via the ….

A

deep facial veins and infraorbital veins

78
Q

from the pterygoid venous plexus blood can reach the ___ sinus

A

cavenous sinus

–> potential route for the spread of infection