Muscle Of Neck Anatomy

The muscles of the neck are present in four main groups. They are usually described within the triangles.

Muscles Of The Neck 1

It is innervated by the accessory nerve the 11th cranial nerve.

Muscle of neck anatomy. Bilateral both sides contraction of the muscle produces flexion of the neck. Unilateral or one sided contraction of the sternocleidomastoid muscle produces lateral rotation of the head. Rectus capitis posterior major and rectus capitis posterior minor attach the inferior nuchal line of the occiput to the c2 and c1 vertebrae respectively.

The suboccipital muscles act to rotate the head and extend the neck. The neck muscles including the sternocleidomastoid and the trapezius are responsible for the gross motor movement in the muscular system of the head and neck. The top section of the spine is the cervical section which contains nerves that innervate muscles of the head neck and thoracic cavity as well as transmit sensory information to the cns.

With one on each side of the neck these help flex the neck and rotate the head upward and side to. Rotation lateral flexion flexion and hyperextension. The motion of the muscles of the neck are divided into four categories.

Anatomy of the neck the neck contains a number of overlapping muscles blood vessels nerves and myriad structures all contained in a small space and liable to damage and distress. Located underneath the platysma on the sides of the neck are the sternocleidomastoid muscles. The cervical spine section contains seven vertebrae c 1 through c 7 and eight nerve pairs c 1 through c 8.

The neck also contains the thyroid and parathyroid glands the esophagus larynx and trachea and also a number of lymph glands. Rotation describes the action of moving the head from side to side lateral motion brings the ear to the shoulder flexion moves the chin to the chest as in looking down. They move the head in every direction pulling the skull and jaw towards the shoulders spine and scapula.

So there are the muscles of the anterior triangle and the muscles of the posterior triangle. The muscles of the neck are a hot topic within anatomy circles.

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