FRONT OF NECK
- BORDERS:
- - Superior - inferior border of mandible
- - Medial - midline of neck
- - Lateral - anterior border of sternocleidomastoid muscle
- CONTENTS
- Muscles:
- thyrohyoid, sternothyroid, sternohyoid muscles
- Organs:
- thyroid gland, parathyroid glands, larynx, trachea, esophagus, submandibular gland, caudal part of the parotid gland
- 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 nerve (CN X), hypoglossal nerve (CN XII), part of sympathetic trunk, mylohyoid nerve
- 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 gland, parathyroid glands, larynx, trachea, esophagus
- - Carotid triangle
- Borders
- Anterior - superior belly of omohyoid muscle
- Superior - stylohyoid and posterior belly of digastric muscles
- Posterior - anterior border of sternocleidomastoid muscle
- 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 nerve (CN X), hypoglossal nerve (CN XII), part of sympathetic trunk
- - Submandibular triangle
- Borders
- Superior - inferior border of mandible
- Lateral - anterior belly of digastric muscle
- Medial - posterior belly of digastric muscle
- Contents
- Viscera: submandibular gland and lymph nodes (anteriorly), caudal part of the parotid gland (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 muscle
- Medial - midline of neck
- Contents
- Anterior jugular vein, submental lymph nodes
ANTERIOR TRIANGLE OF NECK
