Posterior Triangle Flashcards Preview

Spinal Anatomy I - Exam 3 > Posterior Triangle > Flashcards

Flashcards in Posterior Triangle Deck (25):
1

What is the anterior boundary of the triangle of the neck?

a vertical line along the midsagittal plane of the neck

2

What is the posterior boundary of the triangle of the neck?

the anterior border of the trapezius

3

What is the superior boundary of the triangle of the neck?

the inferior border of the skull (mandible, temporal, and occipital bones)

4

What is the inferior boundary of the triangle of the neck?

the superior border of the clavicle

5

What divides the triangle of the neck into the anterior and posterior triangles?

the sternocleidomastoid

6

What is the anterior boundary of the posterior triangle?

the posterior border of the sternocleidomastoid

7

What is the posterior boundary of the posterior triangle?

the anterior border of the trapezius

8

What is the superior boundary of the posterior triangle?

the superior nuchal line and the origin of the sternocleidomastoid

9

What is the inferior boundary of the posterior triangle?

the middle third of the clavicle

10

What is the floor of the posterior triangle?

- splenius capitis
- levator scapulae
- posterior scalene
- middle scalene
- possibly anterior scalene

11

What features are observed in the posterior triangle?

- spinal accessory nerve
- cervical nerve plexus, ventral primary rami C1-C4

12

Which ramus contributes to the lesser occipital nerve? Where does it receive SA fibers from?

- ventral primary ramus C2
- scalp behind the ear

13

Which rami contribute to the greater auricular nerve? Where does it receive SA fibers from?

- ventral primary rami of C2 and C3
- scalp around the ear

14

Which rami contribute to the transverse cervical nerve? Where does it receive SA fibers from?

- ventral primary rami C2 and C3
- anterior triangle of the neck

15

Which rami contribute to the supraclavicular nerve? Where does it receive SA fibers from?

- ventral primary rami C3 and C4
- shoulder and upper chest

16

Which rami contribute to the phrenic nerve?

ventral primary rami C3, C4, and C5

17

What is the function of the phrenic nerve?

- motor to the diaphragm
- sensory from the mediastinal pleura and pericardium of the heart

18

What is the ansa cervicalis?

a neural loop formed from cervical spinal nerves

19

What forms the superior root of the ansa cervicalis?

the ventral primary ramus of C1

20

What does the superior root of the ansa cervicalis innervate?

most of the infrahyoid muscles

21

What forms the inferior root of the ansa cervicalis?

ventral primary rami branches from C2 and C3

22

What muscle subdivides the posterior triangle?

inferior belly of the omohyoid

23

What subdivisions of the posterior triangle are formed by the inferior belly of the omohyoid?

- occipital/posterior cervical triangle (above)
- supraclavicular/subclavian/omoclavicular triangle (below)

24

Which muscles are identified within the prevertebral fascia anterior to the cervical vertebrae?

- longus colli
- longus capitis
- rectus capitis anterior
- rectus capitis lateralis

25

Which muscles are identified as lateral vertebral muscles of the cervical spine?

- anterior scalene
- middle scalene
- posterior scalene

Decks in Spinal Anatomy I - Exam 3 Class (94):