Triangle Of The Neck-1 Flashcards Preview

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Flashcards in Triangle Of The Neck-1 Deck (28):
1

What does the suprasternal space contain?

Connection betweeen the anterior jugular veins and maybe a lymph node

2

Lesser supraclavicular fossa

Site of access to internal jugular vein. Depression between sternal and clavicular heads of SCM

3

Nerve on the anterior surface of the anterior scalene

Phrenic nerve

4

The middle scalene is posterior to what?

Brachial plexus

5

Where does thee brachial plexus exit?

Between the anterior and middle scalenes

6

Where does the accessory nerve travel in the neck musculature?

Emerges from posterior border of SCM (b/t uppper and middle 3rd), runs across thee posterior triangle, passing deep to the trap. Covered only by skin and superficial fascia in the posterior triangle

7

Where do the sensory nerves to the neck emerge?

Posterior border of SCM at midpoint

8

What veins form the external jugular vein?

Posterior auricular and posterior branch of retromandibular vein

9

What is the course of the external jugular vein?

Emerges from parotid gland, runs vertically and superficially across SCM to clavicle, empties into the subclavian vein

10

Which nerve innervates the platysma?

Cervical branch of the facial nerve

11

Superficial layer of deep cervical fascia

Encircles the neck completely. Attaches to spinal processes or ligament up nuchae. Invests around the SCM/trap/inferior belly of omohyoid/infrahyoid. Yields the suprasternal space

12

Preetracheal Fascia

Muscular/visceral layers
Attaches to the hyoid. Fuses with fibrous pericardium.

13

Prevertebral Fascia

Contains the accessory nerve (b/t superficial and preverteebral fasica). Turns into 2 layers: posterior lamina and the alar fascia

14

Retropharyngeal space

Largest potential space behind the pharynx. Alar fascia divides it to form the danger space

15

Anterior triangle boundaries

Anterior border of SCM, mandible, anterior midline of the neck

16

Posterior triangle boundaries

Posterior border of SCM, anterior border of trap and clavicle

17

Nerves in the anterior triangle

Transverse cervical. Great auricular.

18

Posterior triangle nerves

Lesser occipital. Supraclavicular (medial, intermediate, lateral branches)

19

Anterior jugular vein course

Begins at union of submandibular/submental veins (near hyoid bone), runs inferiorly/vertically near midline, empties into external jugular vein. Are connected by a jugular venous arch in suprasternal space

20

Subdivisions of posterior triangle

Occipital triangle, subclavian triangle

21

Boundaries of occipital triangle

SCM, trap, inferior belly of omohyoid

22

Subclavian triangle boundaries

SCM, inferior belly of omohyoid, clavicle (subclavian vessels and external jugular vein)

23

Muscles on the floor of the posterior triangle

Splenius capitis. Levator scapulae. Posterior scalene. Middle scalene. Anterior scalene.

24

Nerves in posterior triangle

Accessory, brachial plexus, cervical plexus

25

Cutaneous branches on the cervical plexus

Lesser occipital
Greater auricular
Transverse cervical
Supraclavicular

26

Muscular branches of cervical plexus

Phrenic
Ansa Cervicalis

27

Phrenic nerve

Mainly c4 contribution, runs on the anterior scalene muscle, supplies diaphragm

28

Ansa Cervicalis

Loop of motor fibers from superior root (c1-2), briefly joins hypoglossal nerve, peels off to joint inferior root. Innervates infrahyoid muscles