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Front 1

DEEP FASCIA

PREVERTEBRAL FASCIA
-anterior to verte. fascia...

Back 1

3. Anterior to the vertebral column, the prevertebral fascia splits into two
layers separated by loose connective tissue; the anterior layer or alar fascia ends inferiorly by fusing with the posterior wall of the esophagus
at about vertebral level T3 and the posterior layer continues inferiorly
on the anterior surface of thoracic vertebral bodies

Front 2

DEEP FASCIA

PREVERTEBRAL FASCIA
-clinical note: "danger space"

Back 2

4. Clinical note: a "danger space" exists between the two layers of the
prevertebral fascia that lie anterior to the vertebral column; an infec-
tion within this space can spread essentially unimpeded between the base of the skull
and thorax.

Front 3

DEEP FASCIA

PRETRACHEAL FASCIA

Back 3

D. Pretracheal Fascia: ensheaths the larynx, trachea, and thyroid gland.

Front 4

DEEP FASCIA

CAROTID SHEATHS

Back 4

E. Carotid Sheaths; lie deep to the sternocleidomastoids and extend from the
base ofthe skull to the root ofthe neck; each contains an internal jugular
vein, common/internal carotid artery, vagus nerve, some deep cervical lymph nodes, and the inferior root of an ansa cervicalis

Front 5

DEEP FASCIA

CLINICAL NOTE

Back 5

F. Clinical note: deep fascia ofthe neck, as well as deep fascia in other parts of
the body, serves as a retaining barrier and helps prevent the spread of in-
fectious material

Front 6

ANTERIOR TRIANGLE

BOUNDED BY...

Back 6

III. Triangles of the Neck

A. Anterior triangle
1. Bounded by the anterior cervical midline, inferior border of the mandible, and sternocleidomastoid; it is subdivided into the triangles noted below

Front 7

ANTERIOR TRIANGLE

SUBMANDIBULAR TRIANGLE

Back 7

SUBMANDIBULAR TRIANGLE

a.Bordered by the anterior cervical midline, inferior border of the mandible
, and sternocleidomastoid; it is subdivided in to the triangles noted below.

Front 8

ANTERIOR TRIANGLE

SUBMANDIBULAR TRIANGLE
-contents

Back 8

b. Contains submandibular lymph nodes and the part of the submandibular gland that lies superficial to the mylohyoid; the facial vein courses superficial to the submandibular gland and the lingual and facial arteries and hypoglossal nerve course deep to the submandibular gland.

Front 9

ANTERIOR TRIANGLE

CAROTID TRIANGLE
-bordered by...

Back 9

3. Carotid triangle

a. Bordered by the posterior belly of the digastric, superior belly of the
omohyoid, and the upper part of sternocleidomastoid

Front 10

ANTERIOR TRIANGLE

CAROTID TRIANGLE
-contents

Back 10

3. Carotid triangle

b. Contains the external carotid artery and proximal portions of the superior thyroid,
ascending pharyngeal, lingual, occipital, and facial arteries; it also contains the portion of the hypoglossal nerve that gives off the superior root of an ansa cervicalis.