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SFM5 > Anterior Triangle of Neck Anatomy > Flashcards

Anterior Triangle of Neck Anatomy Flashcards

1
Q
A

digastric muscle - anterior (orange) and posterior (purple) bellies

“looping” around hyoid bone (pink)

SCM (blue)

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2
Q
A

facial vein (blue) is tributary to IJV (green)

facial vein crosses over submandibular gland (red)

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3
Q
A

facial artery (yellow) is a branch of the ECA (green; external carotid artery)

CN 12 (hypoglossal nerve) (blue)

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4
Q

which muscle can be used to landmark CN XII?

A

hypoglossal nerve runs over posterior belly of digastric muscle

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5
Q
A

internal jugular vein (IJV)

superficial to SCM would be external jugular vein (EJV)

smaller midline veins are anterior jugular veins

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6
Q
A

external jugular vein (EJV) (red)

anterior jugular vein (green)

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7
Q
A

SCM (pink) (cut; superficial)

omoHYoid muscle (green) (cut; lateral to sternohyoid, deep to SCM; omo = scapula)

sternoHYoid (orange)

sternoTHYRoid (blue)

thyroHYoid (purple)

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8
Q

omohyoid

A

scapula (omo) to hyoid; lateral to sternohyoid

depresses hyoid during swallowing and speaking

innervated by ansa cervicalis

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9
Q

sternohyoid

A

anterior neck, just deep to platysma

depresses hyoid during swallowing and speaking

innervated by ansa cervicalis

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10
Q

sternoTHYRoid

A

deep to sternohyoid, inferior to thyrohyoid

depresses hyoid during swallowing and speaking

innervated by ansa cervicalis

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11
Q

thyrohyoid

A

deep to sternohyoid and superior

depresses hyoid during swallowing and speaking

innervated by ansa cervicalis

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12
Q
A

arrows top to bottom:

  • hyoid bone
  • thyroid cartilage
  • cricothyroid muscle
  • cricoid cartilage
    green: thyroid
    purple: thyrohyoid
    red: sternothyroid
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13
Q
A

superior thyroid artery (yellow)

branch of external carotid artery

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14
Q

what arteries supply thyroid?

A

superior (branch of external carotid artery) and inferior (branch of subclavian) thyroid arteries

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15
Q

what veins drain thyroid?

A

superior, middle, and inferior thyroid veins (tributary to brachiocephalic vein)

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16
Q
A

recurrent laryngeal nerve (RLN) (blue)

vagus nerve (yellow)

phrenic nerve (green)

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17
Q

recurrent laryngeal nerve innervates

A

vocal cords

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18
Q
A

omohyoid (green)

IJV (yellow)

common carotid a. (pink)

ansa cervicalis (purple)

vagus n. (blue)

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19
Q
A

top arrow: SCM

bottom arrow: phrenic nerve overlying anterior scalene

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20
Q
A

vertebral artery (pale blue/deep)

thyrocervical trunk (pink)

both are branches of subclavian artery (green)

subclavian vein (yellow)

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21
Q
A

(inferior to superior)

superior thyroid a. (red)

lingual a. (purple)

facial a. (green)

ignore pink

22
Q

lingual a. runs with which nerve?

A

CN XII (hypoglossal)

over the posterior belly of digastric muscle

23
Q
A
24
Q
A

mylohyoid (blue; deep)

digastric, anterior belly (red)

stylohyoid (purple)

25
Q

which vein crosses over submandibular gland

A

facial vein

tributary to internal jugular v.

26
Q

course of facial a.

A

courses under mandible and then meets facial v. to course over submandibular gland

27
Q

what does facial v. drain

A

anterior face

28
Q

nerve on posterior digastric m.

A

hypoglossal n. (CN 12)

29
Q

what does CN XII innervate

A

m. of tongue, geniohyoid m.

30
Q

fiber types CN XII

A

somatic motor

symp post

31
Q

fx sternoHYOid m.

A

depress hyoid bone

32
Q

fx omoHYOid m.

A

depress hyoid bone

33
Q

fx steroTHYRoid m.

A

depress hyoid bone

34
Q

fx thyrohyoid m.

A

depress hyoid b.

35
Q

blood supply of thyroid

A

superior thyroid a. (branch of ECA)

inferior thyroid a. (branch of thyrocervical trunk of subclavian a.)

36
Q

venous drainage of thyroid

A

superior, middle, inferior thyroid v.

superior, middle –> IJV

inferior –> brachiocephalic v.

37
Q

course of recurrent laryngeal nerve

A

groove b/w trachea and esophagus, to larynx

38
Q

recurrent laryngeal n. branches off …

A

CN XI

courses via CN X

39
Q

target of recurrent laryngeal n.

A

muscles of larynx

40
Q

2 branches of common carotid a. (CCA)

A

external and internal carotid a. (ECA and ICA)

41
Q

neurovascular bundle including the CCA

A

CCA, IJV, vagus n.

42
Q

ansa cervicalis innervates …

A

infraHYoid m.s

43
Q

ventral rami ansa cervicalis

A

C1,2,3

44
Q

CN XI is found…

A

deep to SCM

45
Q

CN XI innervates

A

trapezius and SCM

46
Q

nerve related to anterior scalene

A

phrenic nerve lies on top of it

47
Q

2 branches subclavian a.

A

thyrocervical trunk

vertebral a.

48
Q

receptors at common carotid bifurcation and their function

A

carotid sinus baroreceptors sense blood pressure

carotid body chemoreceptors monitor blood O2 and CO2

49
Q

carotid body baroreceptors innervation

A

glossopharyngeal nerve (CN 9)

50
Q

3 branches of ECA in carotid triangle

A

superior thyroid a.

ascending pharyngeal a.

lingual a.

51
Q

3 branches of ECA superior to carotid triangle

A

facial a.

occipital a.

posterior auricular a.

52
Q

structures of interest on mylohyoid

A

lymph nodes

SFM5 (14 decks)

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