Answer:
Answer is sternocleidmastoid muscle.
Step-by-step explanation:
The sternocleidmastoid muscle is the most superficial muscle of the cervical, and it is considered to be the largest in that region. It possesses what can be described as two heads, where one arises from the sternum pigment and the other from the inner part of the clavicle.
It has the following functions
* It has the ability of flexing the neck , when its two sides extends together.
* It was discovered that, during a forced inspiration, it works with the scalene muscle in the neck.