Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Gross Anatomy III > Posterior Cervical Triangle > Flashcards

Posterior Cervical Triangle Flashcards

1
Q

What are the borders of the posterior cervical triangle?

A
  • Sternocleidomastoid muscle
  • Trapezius muscle
  • Clavicle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Posterior triangle is divided by…

A

inferior belly of omohyoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

The inferior belly of omohyoid divides the posterior cervical triangle into what two smaller triangles?

A
  • Occipital triangle
  • Subclavian triangle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What six muscles can be found in the posterior triangle?

A
  • Splenius capitis
  • Levator scapulae
  • Anterior scalene (inferomedial angle of triangle or behind SCM)
  • Middle scalene
  • Posterior scalene
  • Omohyoid (inferior belly)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Innervation of splenius capitis

A

Posterior rami of middle cervical spinal nerves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Actions of splenius capitis

A

Laterally flexes and rotates head and neck to same side; acting bilaterally, extends head and neck

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Innervation of levator scapulae

A

Dorsal scapular nerve C5 and cervical spinal nerves C3 and C4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Actions of levator scapulae

A

Downward rotation of scapula and tilts its glenoid cavity inferiorly by rotating scapula

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Innervation of anterior scalene

A

Cervical spinal nerves C4-C6

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Actions of anterior scalene

A

Flex head

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Innervation of middle scalene

A

Anterior rami of cervical spinal nerves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Actions of middle scalene

A

Flexes neck laterally; elevates 1st rib during forced inspiration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Innervation of posterior scalene

A

Anterior rami of cervical spinal nerve C7 and C8

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Actions of posterior scalene

A

Flexes neck laterally; elevates 2nd rib during forced inspiration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which arteries of the posterior triangle are branches of thyrocervical trunk?

A
  • Transverse cervical artery
  • Suprascapular artery
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The transverse cervical artery is superficial to…

A
  • anterior scalene
  • phrenic nerve
  • trunks of brachial plexus
17
Q

The transverse cervical artery runs ___ toward ___ and bifurcates into ___

A

…runs posteriorly toward trapezius and bifurcates into superficial and deep branches

18
Q

The suprascapular artery is ___ to the clavicle

A

posterior

19
Q

The suprascapular artery is inferolateral across…

A
  • anterior scalene
  • phrenic nerve
  • 3rd part of subclavian artery
  • cords of brachial plexus
20
Q

What are the arteries of the posterior triangle?

A
  • Branches of thyrocervical trunk (transverse cervical and suprascapular arteries)
  • Third part of subclavian artery
  • Occipital artery
21
Q

Where is the third part of the subclavian artery in relation to ribs and brachial plexus?

A
  • Lies on first rib
  • Anterior to inferior (lower) trunk of brachial plexus
22
Q

What are the veins of the posterior triangle?

A
  • External jugular vein
  • Subclavian vein
23
Q

The external jugular vein is deep to ___ and superficial to ___

A

deep to platysma and superficial to SCM

24
Q

Describe drainage by the external jugular vein

A

Drains most of scalp and lateral face into subclavian vein

25
Q

The subclavian vein is anterior to…

A

anterior scalene

26
Q

The subclavian vein joins ___ to form the ___ posterior to the medial end of the clavicle

A

joins internal jugular vein to form the brachiocephalic vein posterior to the medial end of the clavicle

27
Q

What are the three main motor innervation sources of the posterior triangle?

A
  • Spinal accessory (CN XI)
  • Trunks of brachial plexus
  • Deep motor branches of cervical plexus
28
Q

Which trunks of the brachial plexus innervate the posterior triangle?

A
  • Superior (upper) trunk: C5-C6
  • Middle trunk: C7
  • Inferior (lower) trunk: C8-T1
29
Q

Where in the brachial plexus will the suprascapular nerve (C4-C6) branch from?

A

Superior (upper) trunk

30
Q

What are the deep motor branches of the cervical plexus innervating the posterior triangle?

A
  • Dorsal scapular nerve (C4-C5)
  • Long thoracic nerve (C5-C7)
  • Nerve to subclavius (usually C4-C6)
  • Phrenic nerve (C3-C5)
31
Q

What structures are innervated by the dorsal scapular nerve?

A

Rhomboids; occasionally levator scapulae

32
Q

What structures are innervated by the long thoracic nerve?

A

Serratus anterior

33
Q

What structures are innervated by the suprascapular nerve?

A

Supraspinatous and infraspinatus muscles; glenohumeral joint

34
Q

What structures are innervated by the subclavian nerve?

A

Subclavius and sternoclavicular joint

35
Q

Sensory nerves of the posterior triangle are derived from…

A

cervical plexus

36
Q

Which sensory nerves are in the nerve point of the neck (Erb’s point)?

A
  • Lesser occipital nerve (C2)
  • Great auricular nerve (C2-C3)
  • Transverse cervical nerve (C2-C3)
  • Supraclavicular nerves (C3-C4) (medial, intermediate, lateral)

Gross Anatomy III (19 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions