What is the Principle Muscle of the Neck

Question

What is the principle muscle of the neck?
A) digastrics
B) posterior belly
C) anterior belly
D) sternocleidomastoid

Accepted Answer

The sternocleidomastoid muscle is the principle muscle of the neck. It is responsible for flexing the neck forward, rotating the head, and assisting in the elevation of the sternum during deep breathing. The digastrics muscle is located in the lower part of the jaw and plays a role in opening the mouth. The posterior and anterior bellies of the digastrics muscle work together to accomplish this action.