Anatomy Neck Muscles
Located underneath the platysma on the sides of the neck are the sternocleidomastoid muscles. 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.
Anatomy Of The Head And Neck Medical Illustrations Showing
The neck is the region between the head and the rest of the body which is built of different tissue and organs including many skeletal muscles.
Anatomy neck muscles. The muscles of the neck can be divided. The motion of the muscles of the neck are divided into four categories. They are usually described within the triangles.
Rectus capitis anterior begins at the first cervical vertebrae. With one on each side of the neck these help flex the neck and rotate the head upward and side to. Rectus capitis posterior major and rectus capitis posterior minor attach the inferior nuchal line of the occiput to the c2 and c1 vertebrae respectively.
Muscles of the neck. So there are the muscles of the anterior triangle and the muscles of the posterior triangle. They move the head in every direction pulling the skull and jaw towards the shoulders spine and scapula.
The main functions of the neck muscles are to permit movements of the neck or head and to provide structural support of the head. Longus colli begins between the third and sixth cervical vertebrae. The muscles of the neck are a hot topic within anatomy circles.
Rectus capitis lateralis originates from the first. The superficial muscle of the neck the platysma muscle also assists with depression of the mandible against resistance1 the primary muscles of mastication chewing food are the temporalis medial pterygoid lateral pterygoid and masseter muscles. 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.
Unilateral or one sided contraction of the sternocleidomastoid muscle produces lateral rotation of the head. Bilateral both sides contraction of the muscle produces flexion of the neck. 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.
The suboccipital muscles act to rotate the head and extend the neck. The neck also contains the thyroid and parathyroid glands the esophagus larynx and trachea and also a number of lymph glands. Longus capitis begins between the third and sixth cervical vertebrae.
The muscles of the neck are present in four main groups. It is innervated by the accessory nerve the 11th cranial nerve. Rotation lateral flexion flexion and hyperextension.
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