Posterior Triangle of the Neck Flashcards Preview

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Flashcards in Posterior Triangle of the Neck Deck (16):
1

Cervical Fascia

Superficial
Deep
- investing layer
- Prevertebral fascia
- Pretracheal Fascia
- Carotid Sheath
- Retropharyngeal Space
- Suprasternal Space

2

Superficial Fascia

Between the dermis of the skin and the deep investing cervical fascia
Contains the platysma, cutaneous nerves, blood and lymphatic vessels, superficial lymph nodes and fat

3

Deep Fascia - Investing Layer

Ensheathes more highly differentiated structures
Attached to bony prominences
Forms the roof, together with the skin and superficial fascia, of the anterior and posterior triangles of the neck

4

Deep Fascia - Prevertebral Fascia

Surrounds the prevertebral muscles and is continuous with the deep fascia covering the muscular floor of the posterior triangle
Forms a fascial sleeve enveloping deep muscles of the neck

5

Deep Fascia - Pretracheal Fascia

Ill defined layer limited to the front of the neck
Covers infrahyoid muscles and viscera of the neck
Blends with fibrous pericardium inferiorly, and buccopharyngeal fascia of the pharynx superiorly

6

Deep Fascia - Carotid Sheath

Fascial tube that...
Extends from the base of the skull to the root of the neck
Inferiorly = common carotid artery, internal jugular vein, and vagus nerve
Superiorly = internal carotid artery, internal jugular vein, and vagus nerve

7

Deep Fascia - Retropharyngeal Space

Largest and clinically most important interfascial space
Lies between the visceral part of the prevertebral fascia and the buccopharyngeal (pretracheal) fascia of the neck
Opens inferiorly, into the superior mediastinum of the thorax

8

Sternocleidomastoid Region

Key landmark muscle
Divides the neck into Anterior and Lateral Cervical regions

9

Posterior Cervical Region

Region deep to the Trapezius
Muscles include the Trapezius, Splenius, Semispinalis, and Suboccipital muscles

10

Posterior Triangle of the Neck - Lateral Cervical Region - Boundaries

Anteriorly = Posterior border of the SCM
Posteriorly = Anterior border of Trap
Inferiorly = Middle third of the clavicle btw Trap and SCM
Apex = Junction of SCM and Trap at superior nuchal line
Roof = Investing layer of deep fascia
Floor = Prevertebral muscles covered by deep fascia

11

Posterior Triangle of the Neck - Lateral Cervical Region - Muscles

Semispinalis Capitis
Levator Scapulae
Scalenes (Ant.Middle Post)
Omohyoid (posterior belly)
Longus Coli

12

Posterior Triangle of the Neck - Lateral Cervical Region - Muscles (Scalenes)

Anterior = Phrenic nerve on anterior surface
Divides subclavian vein anteriorly from subclavian artery posteriorly
Trunks of brachial plexus posteriorly

13

Posterior Triangle of the Neck - Lateral Cervical Region - Veins

Subclavian
External Jugular
Internal Jugular

14

Posterior Triangle of the Neck - Lateral Cervical Region - Nerves

Brachial Plexus
Cervical Plexus

15

Posterior Triangle of the Neck - Lateral Cervical Region - Nerves - Cervical Plexus

Ventral primary rami of C1-C4
Sensory branches (lesser occipital, great auricular, transverse cervical, supraclaviculars)
Motor branches (C1 to geniohyoid and thyroid, C@ and C3 Ansa cervicalis, Phrenic Nerve C3, 4, 5 keep the diaphragm alive)

16

Posterior Triangle of the Neck - Lateral Cervical Region - Arteries

Transverse cervical
Suprascapular
Occipital
Subclavian