Triangles of neck

Anterior triangle of neck

Superiorly- inferior border of the mandible

Laterally- anterior border of the sternocleidomastoid

Medially- sagittal line down the midline of the neck

Carotid triangle

Superior- posterior belly of digastric muscle

Lateral- medial border of the sternocleidomastoid muscle

Inferior- superior belly of the omohyoid muscle

contents: common carotid artery (which bifurcates), internal jugular vein and the hypoglossal and vagus nerves

Submental triangle

Contains submental lymph nodes (drains from floor of the mouth and parts of the tongue)

Inferiorly- hyoid bone

Medially- midline of the neck

Laterally- anterior belly of the digastric

Floor- mylohyoid muscle

Submandibular triangle

contains submandibular gland and lymph nodes, facial artery and vein

Superiorly- body of the mandible

Anteriorly- anterior belly of the digastric muscle

Posteriorly- posterior belly of the digastric muscle

Muscular triangle

Contains the infrahyoid muscles, the pharynx and the thyroid, parathyroid glands

Superiorly- hyoid bone

Medially- imaginary midline of neck

Supero-laterally- superior belly of the omohyoid muscle

Infero-laterally- inferior portion of the sternocleidomastoid

Triangle for vertebral artery (dissection 4)

Base: first part of subclavian artery

Apex: Anterior tubercle of transverse process of C6

Medial: Longus cervicis m.

Lateral: Scalenus anterior m.

Contents: Vertebral artery and vein, inferior thyroid artery, sympathetic trunk middle, inferior cervical ganglion, and thoracic duct

Suboccipital triangle

Posterior triangle of neck