Posterioir Triangle Of Neck

Question 1

Name the boundaries of the posterior triangle

Answer 1

Sternocleidomastoid/ SCM (anterior)

Trapezius (posterior)

Clavicle (inferior)

Question 2

SCM specifics

Answer 2

Attachments: posterior manubrium; medial clavicle
-lateral mastoid; superior nuchal line

Innervation: CN XI (accessory nerve)

Vasculature: superior thyroid and occipital artery

Action: unilaterally turns face up and away. Bilateral flex ion of neck (raise head from pillow)