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

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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.

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