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Spine Muscles - BIO

Origin, Insertion, Action, Nerve Innervation

MUSCLEORIGININSERTIONACTIONINNERVATION
Scalenes TVP's of cervical vertebrae First and Second ribs Assist w/neck flexion, laterally bending Lower Cervical Nerves
Rectus Abdominis Pubis Xiphoid process, costal cartilage of ribs 5-7 Trunk flexion 7-12 intercostal nerves
Internal Obliques Inguinal ligament, iliac crest, thoracolumbar fascia ribs 10-12, abdominal aponeurosis Trunk flexion bilat., laterally bending and rotation to the same side 8-12 intercostal nerves, iliohypogastric, ilioinguinal nerves
External Obliques lateral surface of last 8 ribs iliac crest, linea alba trunk flexion bilat. lateral bending and rotation to the opposite side 8-12 intercostal nerves, iliohypogastric, ilioinguinal nerves
Transverse Abdominis Inguinal ligament, iliac crest, thoracolumbar fascia, last 6 ribs abdominal aponeurosis, linea alba compression of abdominal contents 7-12 intercostal nerves, iliohypogastric, ilioinguinal nerves
Erector Spinae (spinalis, longissimus, iliocostalis) Spinous processes, TVP's, Ribs from occiput to sacrum and ilium same as origin trunk extension and lateral bending spinal nerves
Transversospinalis (semispinalis, multifidi, rotatores) TVP below Spinous process above trunk extension, rotation to the opposite side spinal nerves
Intertransversarii TVP below TVP above trunk lateral bending spinal nerves
Interspinales Spinous Process below Spinous process above trunk extension spinal nerves
Quadratus Lumborum Iliac crest 12th rib, TVP's of L1-L5 Hip hiking, trunk lateral bending T12; L1
Sternocleidomastoid Sternum; Clavicle Mastoid Process Neck flexion, head hyperextension, lateral bending and rotation to the opposite side Cranial Nerve XI, C2-C3
Splenius Capitis Lower half of nuchal ligament; spinous processes of C7-T3 Occiput and mastoid process Head & neck extension, laterally flex and rotate head to same side Middle/Lower cervical nerves
Splenius Cervicis Spinous Processes of T3-T6 TVP's of C1-C3 neck extension, laterally flex and rotate neck to same side Middle/Lower cervical nerves
Created by: SaraBranch
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