Muscles Moving the T-Spine Flashcards
Iliocostalis (origin) (most lateral, ILS)
broad common tendon at posterior iiiac crest, sacrum
Iliocostalis (insertion)
angles of lower ribs
Iliocostalis (action)
extends the trunk and laterally bends the vertebral column in isolation
Iliocostalis (innervation)
dorsal rami
Iliocostalis (blood supply)
dorsal branches of lumbar arteries
Longissimus (origin) (middle, ILS)
broad common tendon
Longissimus (insertion)
between tubercles and angles of ribs, transverse processes of thoracic vertebrae
Longissimus (action)
extends and laterally bends the vertebral column
Longissimus (innervation)
dorsal rami
Longissimus (blood supply)
dorsal branches of posterior intercostal/subcostal arteries
Spinalis (origin) (most medial, ILS)
broad common tendon
Spinalis (insertion)
spinous processes of upper thoracic vertebrae
Spinalis (action)
extends and laterally bends the vertebral column
Spinalis (innervation)
dorsal rami
Spinalis (blood supply)
dorsal branches of posterior intercostal/subcostal arteries
Multifidi (origin)
sacrum, ilium
Multifidi (insertion)
spinous processes of vertebrae above, spanning 2-4 segments (longest)
Multifidi (action)
stabilization and rotation of vertebral column (stability is primary, rotation is assist)
Multifidi (innervation)
dorsal rami
Multifidi (blood supply)
dorsal branches of lateral sacral arteries
Rotatores (origin)
transverse processes of lumbar region
Rotatores (insertion)
lamina and transverse processes of the spine above, spanning 1-2 segments (shortest)
Rotatores (action)
stabilizes, extends, and rotates the spine (stability is primary, others are assist)
Rotatores (innervation)
dorsal rami
Rotatores (blood supply)
dorsal branches of segmental arteries
