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Neck Muscles (MOORE)

Neck and QL (MOORE)

MusclePADAInnervationMain Actions
Sternocleidomastoid Lateral surface of mastoid process of temporal bone and lateral half of superior nuchal line Sternal Head: Anterior surface of manubrium of sternum Clavicular head: Superior surface of medial third of clavicle Spinal accessory nerve - CN XI C2 and C3 nerves - pain and proprioception Bilateral - extends neck at atlanto occipital joints, flexes cervical vertebrae, extends superior cervical vertebrae while flexing inferior vertebrae unilateral - laterally flexes neck and rotates face superiorly to opposite side With cervical vertebrae fixed, may elevate manubrium and medial ends of clavicles - assist deep respiration
Anterior scalene Transverse processes of C3-C6 1st rib Cervical Spinal Nerves C4-C6 Flex Head
Middle scalene Posterior tubercles of transverse processes of C5-C7 Superior surface of 1st rib, Posterior to groove for subclavian artery Anterior rami of cervical spinal nerves Flexes neck laterally, elevates 1st rib during forced inspiration
Posterior scalene Posterior tubercles of transverse processes of C5-C7 External border of 2nd rib Anterior rami of cervical spinal nerves C7-C8 Flexes neck laterally, elevates 2nd rib during forced inspiration
Quadratus Lumborum Iliolumbar ligament and internal lip of iliac crest medial half of inferior border of 12th rib and tips of lumbar transverse processes Anterior branches of T12 and L1-L4 nerves Extends and laterally flexes vertebral column; fixes 12th rib during inspiration
Created by: Sophie17