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The function of the Sternocleidomastoid is to flex the neck forward and to rotate the head toward sholder on the opposite side..
These two muscles of the neck flex and rotate the head.
The sternocleidomastoid pair and the splenius capitus pair act to rotate the head around the joint between the axis and the atlas.The sternocleidomastoid pair and the splenius capitus pair act to rotate the head around the joint between the axis and the atlas.
sternocleidomastoid
I believe so. the sternocleidomastoid serve to turn the head from side to side and to able one to nod; since I have seen a rat turn from side to side and look up and down I would believe this to be true.
Sternocleidomastoid
The stenrocleidomastoid muscle bilaterally does neck extension, while unilaterally, they laterally flex the Neck to the same side of the muscle contracting, and rotates th neck to the contra lateral side. So if you rotate to the left, the right sternocleidomastoid muscle is working. The right stenrocleidomastoid will also cause right lateral flexion( side bending)
The sternocleidomastoid muscle, also known as sternomastoid and comonly abbreviated as SCM, is a paired muscle in the superficial layers of the anterior portion of the neck. It acts to flex and rotate the head.
The sternocephalicus is a part of the sternocleidomastoid muscle, which "passes obliquely across the side of the neck, being enclosed between the two layers of deep cervical fascia." The origin of its name, sternocleidomastoid, stems from the fact that it has two heads, extending from the sternum and the clavicle.The sternocleidomastoid has three major actions; the first is to bring the head to the shoulder. The second is to rotate the head and the third is to assist in "elevating the thorax during forced inspiration."[The quotes are from the 1977 Collector's Edition of Henry Gray's Gray's Anatomy.]
You always see the same side - as the moon takes the same time to orbit the earth as it does to rotate once on its axis !
square. rotate a square and it's still looks the same rotate a trap and you can tell it's on its side
The sternocleidomastoid muscle is located in the neck