FRONT OF NECK

BORDERS:

- Superior - inferior border of mandible

- Medial - midline of neck

- Lateral - anterior border of sternocleidomastoid

CONTENTS

Muscles:

thyrohyoid, sternothyroid, sternohyoid muscles

Organs:

thyroid , parathyroid glands, larynx, trachea, esophagus, submandibular , caudal part of the parotid

Arteries:

superior and inferior thyroid, common carotid, external carotid, internal carotid artery (and sinus), facial, submental, lingual arteries

Veins:

anterior jugular veins, internal jugular, common facial, lingual, superior thyroid, middle thyroid veins, facial vein, submental vein, lingual veins

Nerves:

vagus (CN X), hypoglossal (CN XII), part of sympathetic , mylohyoid

Subdivisions:

- Muscular (omotracheal) triangle

Borders

Superior - hyoid bone

Lateral - superior belly of omohyoid and anterior border of sternocleidomastoid

Medial - midline of neck

Contents

Muscles: thyrohyoid, sternothyroid, sternohyoid

Vessels: superior and inferior thyroid arteries, anterior jugular veins

Viscera: thyroid , parathyroid glands, larynx, trachea, esophagus

- Carotid triangle

Borders

Anterior - superior belly of omohyoid

Superior - stylohyoid and posterior belly of digastric muscles

Posterior - anterior border of sternocleidomastoid

Contents

Arteries: common carotid, external carotid (and branches except maxillary, superficial temporal and posterior auricular), internal carotid artery (and sinus)

Veins: internal jugular, common facial, lingual, superior thyroid, middle thyroid veins

Nerves: vagus (CN X), hypoglossal (CN XII), part of sympathetic

- Submandibular triangle

Borders

Superior - inferior border of mandible

Lateral - anterior belly of digastric

Medial - posterior belly of digastric

Contents

Viscera: submandibular and lymph nodes (anteriorly), caudal part of the parotid (posteriorly)

Vessels: facial artery and vein, submental artery and vein, lingual arteries and veins

Nerves: mylohyoid, hypoglossal (CN XII)

- Submental triangle

Borders

Inferior - hyoid bone

Lateral - anterior belly of digastric

Medial - midline of neck

Contents

Anterior jugular vein, submental lymph nodes

ANTERIOR TRIANGLE OF NECK