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Gross Anatomy > Carotid Triangle > Flashcards

Carotid Triangle Flashcards

1
Q

Which artery ascends in this space?

A

Common carotid artery

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2
Q

What are the boundaries?

A

Superior belly of omohyoid, posterior belly of digastric, anterior border of SCM.

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3
Q

Which nerve supplies SCM?

A

CN XI

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4
Q

Important landmark of this triangle?

A

Tip of Greater horn of hyoid

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5
Q

Which nerve turns forward (toward tongue) just superior to tip of greater horn?

A

Hypoglossal nerve (CN XII)

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6
Q

Which muscle is lateral to CN XII?

A

Posterior belly of digastric

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7
Q

Which branch of which artery loops over CN XII deep to the digastric muscle?

A

Muscular branch of occipital artery

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8
Q

Which is the only strap muscle not supplied by Ansa Cervacalis?

A

Thyrohyoid

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9
Q

Geniohyoid is supplied by which nerve?

A

C1

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10
Q

Ansa cervacalis supplied which muscles?

A

Strap muscles (except for thyrohyoid)

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11
Q

Superior root of ansa cervacalis (mostly C1) separates from CN XII where?

A

Deep to digastric

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12
Q

Inferior root of ansa cervacalis (C2, C3) does what?

A

Forms loop (ansa) to supply infrahyoid muscles

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13
Q

What 4 things are found in carotid sheath?

A

IC 10 cc in the IV. Internal carotid artery, vagus nerve, common carotid artery, internal jugular vein

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14
Q

Name laryngeal branches of vagus nerve

A

Superior laryngeal, internal laryngeal and external laryngeal nerve

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15
Q

Where does superior laryngeal nerve branch from vagus?

A

Submandibular triangle. Send two branches in carotid triangle.

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16
Q

Which of two superior laryngeal nerve branches is bigger?

A

Internal laryngeal nerve

17
Q

Where does internal laryngeal nerve appear is carotid triangle?

A

Just inferior to tip of greater horn of hyoid

18
Q

What does internal laryngeal nerve do?

A

Penetrates thyrohyoid membrane to supply sense to superior 1/2 of larynx

19
Q

Where does External Laryngeal nerve enter carotid triangle?

A

Posterior to internal laryngeal nerve and travels with superior thyroid artery (large)

20
Q

What does external laryngeal nerve provide?

A

Motor to cricothyroid muscle and inferior constrictor

21
Q

Which 3 fascias is carotid sheath derives from?

A

Prevertebral, pretracheal, investing fascia

22
Q

Name branches of Common Carotid Artery

A

NO COLLATERAL BRANCHES

23
Q

What happens to Common Carotid?

A

Bifurcates into internal and external carotid artery just INFERIOR TO TIP OF GREATER HORN OF HYOID

24
Q

What does internal carotid artery supply?

A

Brain and special senses

25
Q

Where does internal carotid enter skull?

A

Carotid canal at base of skull

26
Q

Name branches of internal carotid artery?

A

NO BRANCHES IN NECK!! 1st branch in skull

27
Q

Carotid body and sinus supplied by which nerve?

A

CN IX, X

28
Q

Carotid body is found…?

A

On medial surface of bifurcation of common carotid artery

29
Q

What does carotid body respond to?

A

Changes in O2, CO2 concentrations

30
Q

What type of receptor is carotid body?

A

Chemoreceptor

31
Q

Where is carotid sinus found?

A

Beginning of Internal Carotid and end of Common Carotid Artery

32
Q

What does carotid sinus respond to?

A

Pressure

33
Q

What type of receptor is carotid sinus?

A

Baroreceptor (pressure)

34
Q

What does external carotid artery supply?

A

Braincase and face

35
Q

Name branches of external carotid artery

A

Facial, occipital, lingual, ascending pharyngeal, superior thryoid, superior laryngeal

36
Q

What does internal jugular vein do?

A

Drains braincase and face

37
Q

Where does internal jugular vein exit skull?

A

Jugular foramen

38
Q

Which veins does internal jugular vein receive?

A

Occipital vein, common facial vein, lingual vein, superior thyroid vein, middle thyroid vein

39
Q

What does inferior thyroid vein empty into?

A

Brachiocephalic vein

Gross Anatomy (9 decks)

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