Multifidus
Back
One of the most important spinal stabilizers — atrophy of multifidus is strongly linked to chronic low back pain.
Function
Stabilizes spine, extends and rotates vertebral column
Origin
Sacrum, iliac crest, mamillary processes of lumbar, transverse processes of thoracic, articular processes of C4-C7
Insertion
Spinous processes 2-4 segments above origin
Innervation
Dorsal rami of spinal nerves