The Muscle That Partitions the Neck into Two Clinically Important

Question

The muscle that partitions the neck into two clinically important triangles is the
A)pectoralis major.
B)sternocleidomastoid.
C)trapezius.
D)external oblique.
E)occipitalis.

Accepted Answer

The sternocleidomastoid muscle runs diagonally across the neck and can be easily seen and palpated. It divides the neck into two triangles - the anterior triangle and the posterior triangle. These triangles are important for clinical examination and procedures such as giving injections or accessing blood vessels. None of the other muscles listed partition the neck into these clinically distinct regions.