Multifidus is a series of small muscles which travel up the length of the spine. It is an important muscle in the rehabilitation of Gilmore's Groin and lower back pain.
Origin : Posterior surface of the sacrum.
Articular processes of the lumbar vertebrae.
Transverse processes of the thoracic vertebrae.
Articular processes of C3-7.
Insertion : Each part of the muscle inserts into the spinous process 2-4 vertebrae higher than its origin.
Actions : Extension.
Rotation of the spine.
Innervation : Dorsal rami of the spinal nerves.
Daily uses : Maintaining good posture of the spine.
Example strengthening exercises : Dorsal raises.
Example stretching exercises : Back arch stretch.