Lumbar Spine Muscles Flashcards
(30 cards)
Iliocostalis origin
Broad common tendon (post iliac crest, post sacrum, SI ligaments, sacral and lower lumbar SPs)
Iliocostalis insertion
Angles of lower ribs (more posterior) 6-12
Iliocostalis action
Extends and laterally bends vertebral column
Iliocostalis innervation
Dorsal rami of each region
Iliocostalis blood supply
Dorsal branches of lumbar arteries
Longissimus origin
Upper intermediate part of common tendon
Longissimus insertion
Between tubercles and angles of ribs, transverse processes of thoracic
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
Upper intermediate part of the common tendon
Spinalis insertion
Spinous processes of upper thoracic vertebrae
Spinalis action
Extends and laterally bends vertebral column
Spinalis innervation
Dorsal rami of each region
Spinalis blood supply
Dorsal branches of posterior intercostal & subcostal arteries
Multifidi origin
Sacrum, ilium
Multifidi insertion
Spinous processes of vertebrae above, spanning two to four segments
Multifidi action
Spinal stabilizer, assists with rotation and extension
Multifidi innervation
Dorsal rami of lumbar region
Multifidi blood supply
Dorsal branches of lateral sacral arteries
Rotatores origin
Transverse processes
Rotatores insertion
Lamina and spinous process of spine above, spanning one or two segments
Rotatores action
Stabilizes, extends, and rotates spine
Rotatores innervation
Dorsal rami of spinal nerves
