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Trunk Muscles

QuestionAnswer
Origin of Rectus Abdomnius pubis
insertion of Rectus Abdomnius costal cartilages of 5th, 6th and 7th ribs
innervation of Rectus Abdomnius 7th-12th intercostal nerves
actions of Rectus Abdomnius trunk flexion, compression
origin of external oblique lower 8 ribs laterally
insertion of external oblique iliac crest, linea alba
innervation of external oblique 8th-12th intercostal nerves, iliohypogastric nerves, ilioinguinal nerves
actions of external oblique B: compression & trunk flexion U: lateral bend & rotation to opposite side
origin of internal oblique inguinal ligament, iliac crest, thoracolumbar fascia
insertion of internal oblique 10th, 11th and 12th ribs, abdominal aponeurosis
innervation of internal oblique 8th-12th intercostal nerves, iliohypogastric nerves, ilioinguinal nerves
actions of internal oblique B: compression & trunk flexion U: lateral bend & rotation to same side
origin of transverse abdominus inguinal ligament, iliac crest, thoracolubar fascia last 6 ribs
insertion of transverse abdominus abdominal aponeurosis, linea alba
innervation of transverse abdominus 7th-12th intercostal nerves, iliohypogastric nerves, ilioinguinal nerves
actions of transverse abdominus compression
origin of sternocleidomastoid sternum, clavicle
insertion of sternocleidomastoid mastoid process
innervation of sternocleidomastoid accessory nerve, 2nd & 3rd cervical nerves
actions of of sternocleidomastoid B: cervical flexion U: rotation to opposite side & lateral bend
origin of scalenes transverse processes of the cervical vertebrae
insertion of scalenes 1st & 2nd ribs
innervation of scalenes lower cervical nerve
actions of scalenes B: assists w/ neck flexion U: lateral bend
origin of splenius capitis lower half of nuchal ligament, spinous processes of C7-T3
insertion of splenius capitis lateral occipital bone, mastoid process
innervation of splenius capitis middle and lower cervical nerves
actions of splenius capitis B: neck extension & head extend U: rotation of head to same side
origin of splenius cervicis spinous processes of T3-T6
insertion of splenius cervicis transverse processes of C1-C3
innervation of splenius cervicis middle and lower cervical nerves
actions of splenius cervicis B: neck extension U: rotate neck to same side
origin of erector spinae spinous processes, transverse processes, posterior ribs fom the occiput to the sacrum and ilium
insertion of erector spinae spinous processes, transverse processes, posterior ribs fom the occiput to the sacrum and ilium
innervation of erector spinae spinal nerves
actions of erector spinae B: extend trunk U: lateral bend
origin of quadratus lumborum iliac crest
insertion of quadratus lumborum 12th rib, transverse processes of L1-L5
innervation of quadratus lumborum 12th thoracic and 1st lumbar nerves
actions of quadratus lumborum lateral bend hike hip
Created by: eml
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