Posterior Triangle of the Neck Flashcards Preview

Gross Anatomy 2 > Posterior Triangle of the Neck > Flashcards

Flashcards in Posterior Triangle of the Neck Deck (24):
1

Fascia of the Posterior Triangle of the Neck

2

Platysma

Attachments

From fascia above pectoralis major and clavicle to lateral neck and onto mandible

3

Platysma

Innervation

Facial nerve (CN VII)

4

Borders of the Posterior Triangle of the Neck

5

Nerves and Vasculature

6

Nerves and Vasculature of the Posterior Triangle of the Neck

7

Nerves of the Posterior Triangle of the Neck

8

Cutaneous Nervous Supply to Head and Neck

9

Veins

External jugular to SCM

Internal jugular posterior to SCM

Anterior jugular midline (may be absent)

10

Neck Structures

11

Neck Structures

12

Neck Structures

13

Sternocleidomastoid (SCM)

Innervation

Motor - Spinal accessory (CN XI)

Pain and Proprioception - Cervical plexus (C2, C3)

14

Movements of SCM

15

Trapezius

Function

A - Ascending part depresses scapula

B - Transverse part retracts scapula

C - Descending part elevates scapula and rotates glenoid cavity

16

Trapezius

Innervation

Spinal accessory nerve (CN XI)

Cervical plexus (C3, C4) (Proprioception)

17

Floor of the Posterior Triangle of the Neck

Omohyoid

 

Depresses hyoid bone (ansa cervicalis)

18

Floor of the Posterior Triangle of the Neck

Splenius capitis

Extend the neck, rotate (dorsal rami middle cervical)

19

Levator Scapulae

Attachments

Transverse processes of atlas and axis, 3rd and 4th C vertebrae to medial scapular border between superior angle and medial end of scapular spine

20

Levator Scapulae

Function

Help control scapular position, elevate shoulder, and can laterally flex neck to the same side when the shoulder is fixed

21

Levator Scapulae

Innervation

Direct C3, 4 and C5 via dorsal scapular nerve

22

Scalenes

Attachments

From transverse processes of C3-6 (anterior)

C2-7 (middle)

C4-6 (posterior) 

To ribs 1 (scalene tubercle - anterior, and behind subclavian artery groove - middle) and 2 posterior

23

Scalenes

Function

Flex neck (bilateral), tild head to same side (unilateral) and elevate upper ribs

24

Scalenes

Innervation

Middle scalene (anterior rami C3-7)

Anterior scalene (anterior rami C4-7)

Posterior scalene (anterior rami C5-7)