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NYCC Gross Anatomy 3 > Posterior Cervical Triangle > Flashcards

Posterior Cervical Triangle Flashcards

1
Q

the posterior cervical triangle is also known as the ____

A

lateral cervical region

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2
Q

what forms the anterior, posterior and inferior borders of the posterior cervical triangle?

A

ant: post margin of SCM
post: ant margin of trapezius
inf: lat 1/3 clavicle

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3
Q

what forms the apex, roof, and floor of the posterior cervical triangle

A

apex: superior nuchal line
roof: platysma
floor: fascia

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4
Q

muscles comprising the floor of the posterior cervical triangle are surrounded by ____

A

prevertebral fascia

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5
Q

the posterior cervical triangle is divided by the ____

A

inferior belly of omohyoid muscle

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6
Q

name the muscles of the posterior cervical triangle

A
  • splenius capitus
  • levator scapulae
  • anterior scalene
  • middle scalene
  • posterior scalene
  • omohyoid (inf belly)
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7
Q

superior & inferior attachments of longus colli

A

S: ant tubercle C1, bodies C1-C3, TPs C3-C6
I: bodies C5-T3, TPs C3-C5

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8
Q

innervation of longus colli

A

anterior rami C2-C6 spinal nn

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9
Q

actions of longus colli

A

flex neck w/ rotation (torsion) to opposite side (unilateral)

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10
Q

superior & inferior attachments of longus capitis

A

S: basilar part of occipital bone
I: ant tubercles C3-C6 TPs

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11
Q

innervation of longus capitis

A

ant rami C1-C3 spinal nn

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12
Q

superior & inferior attachments of rectus capitis anterior

A

S: base of cranium, just ant to occipital condyle
I: ant surface of lateral mass of C1

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13
Q

innervation of rectus capitis anterior

A

branches from loop between C1 & C2 spinal nn

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14
Q

superior & inferior attachments of anterior scalene

A

S: TPs C3-C6
I: 1st rib

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15
Q

innervation of anterior scalene

A

C4-C6 spinal nn

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16
Q

action of longus capitis, rectus capitis, and anterior scalene

A

flex head

17
Q
A
18
Q

arteries of the posterior triangle are branches of the ____

A

thyrocervical trunk

19
Q

the thyrocervical trunk is a branch of the ____

A

subclavian a

20
Q

name 2 branches of the thyrocervical trunk

A

transverse cervical a
suprascapular a

21
Q

describe the location of the transverse cervical artery

A
  • superficial to ant scalene, phrenic n, & trunks of brachial plexus
  • runs post. toward trapezius
  • bifurcates into superficial & deep branches
22
Q

describe the location of the suprascapular artery

A
  • post. to clavicle
  • inferolat. across ant scalene, phrenic n, 3rd part of subclavian a, & cords of brachial plexus
23
Q

name 4 arteries of the posterior triangle

A
  • transverse cervical
  • suprascapular
  • 3rd part of subclavian
  • occipital
24
Q

describe the location of the 3rd part of subclavian artery

A
  • lies on 1st rib
  • ant to inf (lower) trunk of brachial plexus
25
Q

the occipital artery is a branch of the ____

A

external carotid a

26
Q

describe the location of the occipital artery

A

at apex of posterior triangle

27
Q

name the 2 veins of the posterior triangle

A

external jugular
subclavian

28
Q

describe the location of the external jugular vein

A

deep to platysma
superficial to SCM

29
Q

the external jugular vein drains most of the ____ into the ____

A

scalp & lateral face
subclavian v

30
Q

describe the location of the subclavian vein

A

anterior to anterior scalene

31
Q

what forms the brachiocephalic vein and where is this located?

A
  • internal jugular v + subclavian v
  • posterior to medial end of clavicle
32
Q

name the 3 general categories of motor nerves of the posterior triangle

A
  • spinal accessory (CN XI)
  • trunks of brachial plexus
  • deep motor branches of cervical plexus
33
Q

name the trunks of the brachial plexus and their associated spinal levels

A
  • superior (upper) = C5-C6
  • middle: C7
  • inferior (lower): C8-T1
34
Q

what motor nerve originates from the superior (upper) trunk of the brachial plexus?

A

suprascapular n (C4, C5, C6)

35
Q

name 4 deep motor branches of the cervical plexus

A
  • dorsal scapular n (C4-C5)
  • long thoracic n (C5, C6, C7)
  • n to subclavius (C4, C5, C6)
  • phrenic n (C3, C4, C5)
36
Q

sensory nerves of the posterior triangle form the ____

A

cervical plexus

37
Q

where do sensory nerves of the posterior triangle emerge?

A

nerve point of the neck (Erb’s point)

38
Q

name the sensory nerves of the posterior triangle

A
  • lesser occipital n (C2)
  • great auricular n (C2-C3)
  • transverse cervical n (C2-C3)
  • suprascapular nn (medial, intermediate, lateral; C3-C4)

NYCC Gross Anatomy 3 (16 decks)

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