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What is the muscle on the side of the neck that flexes the head?
sternocleidomastoid
Do rats have a 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.
What is the function of the sternocleidomastiod muscle?
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.
What is the function of the sternocleidomastiod?
The function of the Sternocleidomastoid is to flex the neck forward and to rotate the head toward sholder on the opposite side..
Prime mover of flexion of head?
The prime mover of flexion of the head is the sternocleidomastoid muscle. It acts to tilt and rotate the head to the opposite side when contracted unilaterally and both muscles together flex the neck and bring the head towards the chest.
Which muscles flexes the head?
The name of the muscle is sternocleidomastoid. As the name suggests, the muscle arise from the sternum and clavicle to reach the mastoid process. You have two muscles, one muscle on each side.
What is the function of the sternocleidomastoid of the human body?
The sternocleidomastoid muscle is responsible for rotating and flexing the head. It also helps in tilting the head to either side. Additionally, it plays a role in assisting with breathing by raising the sternum during deep inhalation.
What type of movement occurs when you turn your head from side to side to say no?
The movement is called rotation, where the head pivots around the axis of the neck to enable movement from side to side. This movement primarily involves the atlas and axis vertebrae at the top of the spine.
What cranial nerve controls neck and shoulder movements?
Cranial Nerve XI (eleven) is know as the spinal accessory nerve and is responsible for the action of shoulder shrugging by way of its innervation of the trapezius muscle. The function of this cranial nerve may also be tested by asking the patient to turn their head to the left and right and by resisting this motion by placing your hand on their chin (the muscle tested in this second scenario is the Sternocleidomastoid, SCM).
What is the sternocephalicus muscle?
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.]
How many sternocleidomastoid muscles in the normal human body?
There are two sternocleidomastoid muscles in the normal human body, one on each side of the neck. These muscles originate from the sternum and clavicle and insert on the mastoid process of the temporal bone. They are responsible for rotating and flexing the head.
When you flex your arm muscle what happens?
The muscle in your arm contracts. The muscle on the other side of your arm, opposite from the side that you are flexing, stretches.
