Lab 1 - Back, Spine & Spinal Cord Flashcards
iliocostalis
action, innervation, inferior / superior attachment?
action
1) spine extension (bilateral contraction)
2) lateral bending (unilateral contraction)
innervation
posterior rami of lumbar, thoracic, and cervical spinal nerves
inferior attachment
pelvis (iliac crest), sacrum, L5-L1 vertebrae (spinous processes)
superior attachment
ribs 1-12 (angles)
T12-C3 vertebrae (transverse processes)
Note: iliocostalis = lumborum, thoracis, cervicis
longissimus
action, innervation, inferior/superior attachment?
action
1) spine extension (bilateral contraction)
2) lateral bending (unilateral contraction)
innervation
posterior rami of lumbar, thoracic, and cervical spinal nerves
inferior attachment
L4-T1 vertebrae (transverse processes)
superior attachment
ribs 1-12 (lateral to tubercles), C7-C3 vertebrae (transverse processes), temporal bone (mastoid process)
Note: longissimus = lumborum, thoracis, cervicis
spinalis
action, innervation, inferior / superior attachment?
action
upper spine or atlanto-occipital joint extension (bilateral contraction)
innervation
posterior rami of thoracic and cervical spinal nerves
inferior attachment
L5-T1 vertebrae (spinous processes)
superior attachment
T12-C7 vertebrae (spinous processes)
occipital bone (between superior and inferior nuchal lines)
Note: spinalis = thoracis, cervicis, capitis
what are the 3 erector spinae muscles, starting laterally and moving medially toward spine?
iliocostalis
longissimus
spinalis