Triangles of the Neck - UNFINISHED

Anterior Triangle - anterior boundary

Neck midline

Anterior triangle - posterior boundary

Anterior sternocleidomastoid border

Anterior Triangle - superior border

Inferior border of the mandible

Anterior Trinagle - Roof

Platysma and investing layer of deep fascia

Anterior Triangle - floor

Pharynx, Larynx, and thyroid gland

Subdivisions of the Anterior Triangle

• Submental

• Submandibular/Digastric

• Carotid

• Muscular

Submental Triangle - Boundaries

Medial - neck midline

Lateral - anterior digastric belly

Inferior - hyoid bone

Submental Triangle - Floor

Mylohyoid

Submental Triangle - Contents

Submental lymph nodes and small veins forming the anterior jugular vein

Submandibular/Digastric Triangle - Boundaries

Mandible and the anterior + posterior digastric bellies

Submandibular/Digastric Triangle - Floor

Mylohyoid and hyoglossus

Submandibular/Digastric Triangle - contents

• Submandibular gland

• Facial artery

• Facial vein

• Hypoglossal nerve (CN XII)

• Submandibular lymph nodes

Carotid Triangle - Boundaries