Anterior Triangle of the Neck Flashcards Preview

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Flashcards in Anterior Triangle of the Neck Deck (12):
1

Boundaries

Ant = median line of the neck
Post = anterior border of SCM
Sup = inferior border of mandible
Apex = jugular notch of sternum
Roof = subcutaneous tissue covering platysma
Floor = pharynx, larynx, thyroid gland

2

Subdivisions

Submental triangle
Submandibular triangle
Carotid triangle
Muscular triangle

3

Suprahyoid Muscles and innervations

Mylohyoid - V3
Geniohyoid - C1
Stylohyoid - VII
Digastric - Ant belly V3, Post belly VII

4

Infrahyoid Muscles and Innervations

Sternohyoid, Sternothyroid, Omohyoid - Ansa
Thyrohyoid - C1

5

Which gland is in this triangle?

Submandibular gland

6

Veins/Vessels

Common Carotid
Internal Carotid (no branches in neck)
External Carotid
Internal Jugular Vein

7

Common Carotid

Upper border f the thyroid cartilage bifurcates into external and internal carotid arteries
Carotid sinus (baroreceptor) and body (chemoreceptor)

8

Internal Carotid

No branches in the neck

9

External Carotid

Eight branches
Superior Thyroid
Ascending pharyngeal
Lingual
Facial
Occipital
Posterior Auricular
Maxillary
Superficial Temporal

10

Nerves

Vagus Nerve (CN X) - leaves skull with CN IX and XI
Cervical Plexus
Sympathetic Trunks (Inf, middle, sup ganglia)
Glossopharyngeal to stylopharngeus
Accessory to Trap and SCM
Hypoglossal to muscles of tongue

11

Cervical Plexus

Ventral Rami of C1-C4
Sensory branches - Lesser occipital, greater auricular, transverse cervical, supraclavicularis
Motor branches - C1 to geniohyoid and thyrohyoid, C2, C3, Ansa Cervicalis, Phrenic nerve - C3,4,5 - diaphragm

12

Glands...

Thyroid gland
Parathyroid gland
Larynx and trachea
Esophagus