Triangles of Neck Flashcards
Veins of Posterior Triangle
EJV (external jugular vein)
Boundaries of Posterior Triangle
Anterior– Posterior border of SCM
Posterior– Anterior border of trapezius
Inferior– superior border of clavicle
Arteries of Posterior Triangle
transverse cervical artery
subclavian artery
suprascapular artery
Nerves of Posterior Triangle
trunks of brachial plexus
CN11 (accessory nerve)
cutaneous branches of cervical plexus
Muscles of Posterior Triangle
inferior belly of omohyoid muscle
floor composed of medial and posterior scalenes, levator scapula, splenius capitis
Lymph nodes of Posterior Triangle
cervical and surpascapular lymph nodes
The Posterior Triangle is divided into
the occipital triangle
supraclavicular (subclavian or omoclavicular) triangle
separated by the inferior belly of omohyoid muscle
Boundaries of the Anterior Triangle
Anterior border of SCM
Midline of neck
Mandible
The Anterior Triangle Contains
hyoid muscles, arteries veins, nerves, lymph nodes, viscera
The four subdivisions of the Anterior Triangle
Submandibular Triangle (digastric)
Carotid Triangle
Muscular Triangle
Submental Triangle
Borders of the Submandibular Triangle:
anterior and posterior bellies of digastric, and mandible
Contents of the Submandibular Triangle
submandibular gland/duct, submandibular lymph nodes, CN 12 (hypoglossal)
Borders of the Carotid Triangle
superior belly of omohyoid
posterior belly of digastric
anterior border of SCM
Contents of the Carotid Triangle
CCA, ECA
IJV
CN 10 (vagus), CN 11 (accessory) CN 12 (hypoglossal), superior root of ansa cervicalis, branches of cervical plexus
thyroid, larynx, pharynx
Borders of Muscular Triangle
superior belly of omohyoid
anterior border of SCM, median plane of neck (midline)
