Lumbar innervation and action Flashcards
1
Q
Multifidus
A
Innervation: Medial branch of the posterior rami of spinal
nerves
Action: Stabilizes vertebrae in local movements of the
vertebral column
Bilaterally extends the vertebral column
Unilaterally produces contralateral rotation
2
Q
Erector spinae
Longissimus
Thoracic pars lumborum
Iliocostalis lumborum
A
Innervation: segmental
Action: Primary extensors of vertebral column
Acting bilaterally, they straighten the back–
returning it from an flexed position.