click below
click below
Normal Size Small Size show me how
Neck Muscles (MOORE)
Neck and QL (MOORE)
Muscle | PA | DA | Innervation | Main 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 |