Anterior Triangle of the Neck

Question 1

Boundaries

Answer 1

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

Question 2

Subdivisions

Answer 2

Submental triangle
Submandibular triangle
Carotid triangle
Muscular triangle

Question 3

Suprahyoid Muscles and innervations

Answer 3

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

Question 4

Infrahyoid Muscles and Innervations

Answer 4

Sternohyoid, Sternothyroid, Omohyoid - Ansa

Thyrohyoid - C1

Question 5

Which gland is in this triangle?

Answer 5

Submandibular gland

Question 6

Veins/Vessels

Answer 6

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

Question 7

Common Carotid

Answer 7

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

Question 8

Internal Carotid

Answer 8

No branches in the neck

Question 9

External Carotid

Answer 9

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

Question 10

Nerves

Answer 10

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

Question 11

Cervical Plexus

Answer 11

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

Question 12

Glands…

Answer 12

Thyroid gland
Parathyroid gland
Larynx and trachea
Esophagus