Lumbar spine Flashcards
iliocostalis origin
Broad common tendon at posterior iliac crest, posterior sacrum, SI ligs, sacral and lower lumbar spinous processes
iliocostalis insertion
angles of lower ribs
Iliocostalis action
extends and laterally bends vertebral column
iliocostalis innervation
dorsal rami
iliocostalis blood supply
Dorsal branches of lumbar arteries
longissimus origin
Intermediate part of broad common tendon, posterior sacrum, SI ligaments, sacral and lower lumbar spinous processes
Longissimus insertion
between tubercles and angles of ribs, transverse processes of thoracic vertebrae
Longissimus action
extends and laterally bends vertebral column
longissimus innervation
Dorsal rami of each region
Longissimus blood supply
Dorsal branches of posterior intercostal, subcostal arteries
Spinalis origin
Intermediate part of broad common tendon, posterior sacrum, SI ligaments, sacral snd lower lumbar spinous processes
Spinalis insertion
spinous processes of upper thoracic vertebrae
Spinalis action
Extends and laterally bends the spinal column
Spinalis innervation
Dorsal rami
Spinalis blood supply
dorsal branches of posterior intercostal, subcostal arteries
Multifidi origin
sacrum, ilium
multifidi insertion
lamina and spinous process of spine
multifidi action
spinal stabilization helps with rotation and extention
Multifidi innervation
dorsal rami
Multifidi blood supply
Dorsal branches of segmental arteries
Rotatores origin
Transverse processes
Rotatores insertion
Lamina and spinous processes of spine above, spanning one or two segments
Rotatores action
stabilizing, extends, and rotates spines
rotatores innervation
dorsal rami of spinal nerves
