Triangles of the Neck Flashcards
What are the boundaries of the POSTERIOR TRIANGLE?
Anterior border: the posterior border of the sternocleidomastoid.
Posterior border: the anterior border of the trapezius.
Inferior border: superior border of the middle third of the clavicle.
What are the boundaries of the ANTERIOR TRIANGLE?
Superior border: the inferior border of the mandible
Anterior border: the anterior midline
Posterior border: the anterior border of the sternocleidomastoid.
Where is the apex of the ANTERIOR triangle located?
Inferiorly, at the jugular notch of the manubrium
What forms the roof of the ANTERIOR triangle?
The investing layer of deep cervical fascia, the superficial cervical fascia, and the platysma.
What are the four subdivisions of the ANTERIOR triangle?
Submental Triangle
Submandibular Triangle
Carotid Triangle
Muscular Triangle
The Submental triangle is the only ANTERIOR triangle to be what?
Unpaired
What are the boundaries of the SUBMENTAL triangle?
the left and right anterior bellies of digastric, and the body of the hyoid bone.
The floor of the SUBMENTAL triangle is formed by what structure?
Mylohyoid muscle
What are the contents of the SUBMENTAL triangle?
minor veins and lymph nodes
Name the boundaries of the SUBMANDIBULAR (digastric) triangle
the inferior border of the mandible, the anterior belly of digastric and the posterior belly of digastric
What forms the floor of the SUBMANDIBULAR triangle?
the mylohyoid and hyoglossus muscles
What are the contents of the SUBMANDIBULAR triangle?
the submandibular gland, the internal carotid artery, facial artery, internal jugular vein, glossopharyngeal nerve (C.N. IX), and the vagus nerve (C.N. X).
What are the boundaries of the CAROTID triangle?
The posterior belly of digastric, the superior belly of omohyoid and the anterior border of sternocleidomastoid.
What forms the floor of the CAROTID triangle?
portions of the thyrohyoid, hyoglossus and inferior and middle constrictor muscles
What are the contents of the CAROTID triangle?
parts of the common and internal carotid arteries, the external carotid artery and three of its branches: the superior thyroid artery, lingual artery and facial artery. Also contained within the CAROTID triangle are the corresponding tributaries of the internal jugular vein.
