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The anterior scalene muscle (Latin: scalenus anterior), lies deeply at the side of the neck, behind the sternocleidomastoid muscle.It arises from the anterior tubercles of the transverse processes of the third, fourth, fifth, and sixth cervical vertebrae, and descending, almost vertically, is inserted by a narrow, flat tendon into the scalene tubercle on the inner border of the first rib, and ...
The nerve is important for breathing because it provides exclusive motor control of the diaphragm, the primary muscle of respiration. In humans, the right and left phrenic nerves are primarily supplied by the C4 spinal nerve, but there is also a contribution from the C3 and C5 spinal nerves. From its origin in the neck, the nerve travels ...
They are located laterally to the transverse processes between prevertebral muscles from the medial side and vertebral (m. scalenus, m. levator scapulae, m. splenius cervicis) from lateral side. There is anastomosis with accessory nerve, hypoglossal nerve and sympathetic trunk. It is located in the neck, deep to the sternocleidomastoid muscle. [5]
Apex: Union of the sternocleidomastoid and the trapezius muscles at the superior nuchal line of the occipital bone. Anteriorly: Posterior border of the sternocleidomastoideus. Posteriorly: Anterior border of the trapezius. Inferiorly: Middle one third of the clavicle. Roof: Investing layer of the deep cervical fascia. Floor: (From superior to ...
Right: diagram of the course of the brachial plexus in relation to other important anatomic structures in the right side of the neck. The interscalene block is performed by injecting local anesthetic to the nerves of the brachial plexus as it passes through the groove between the anterior and middle scalene muscles , at the level of the cricoid ...
Trapezius muscle; elevation of the ribs. Pectoralis minor muscle; Scalene muscles; mandible. Medial pterygoid muscle; upper lip. Levator labii superioris; upper lip and wing of nose. Levator labii superioris alaeque nasi muscle; angle of mouth. Levator anguli oris; upper eyelid. Levator palpebrae superioris muscle; eyeball. Superior rectus muscle
It descends in front of the longus colli muscles. The prevertebral fascia is prolonged downward and laterally behind the carotid vessels and in front of the scalene muscles . It forms a sheath for the brachial nerves , subclavian artery , and subclavian vein in the posterior triangle of the neck; it is continued under the clavicle as the ...
The second part, also known as the scalene part, [4] lies behind the anterior scalene muscle. [1] The third part, also known as the postscalene part, [4] extends from the lateral margin of the muscle to the outer border of the first rib, where it becomes the axillary artery. [1] [2]