Here at Osmosis, we support each other - weвЂ™ve got each otherвЂ™s backs. Contralateral rotation of the vertebral column.Lamina/spinous process of process 1 (brevis) to 2 (longus) segments above origin Stabilize vertebrae during local movements of the vertebral column Spinous processes located 2 to 4 segments superior to their origin Transverse processes of the thoracic vertebrae.Mammillary processes of the lumbar vertebrae,.Posterior superior iliac spine of the ilium.Extend head and cervical and thoracic regions.fibers run superomedially to occipital bone and spinous processes in thoracic and cervical regions, spanning 4вЂ“6 segments.Semispinalis: thoracis, cervicis, capitis: *variable, may be absent or fused with other musclesДeep Intrinsic back muscles (transversospinales) Spinous processes in upper thoracic region.Transverse processes of thoracic vertebrae.Control movement via eccentric contraction.

Transverse processes of lumbar vertebrae.

Transverse processes of cervical vertebrae.

Sacral and inferior lumbar spinous processes.

Intermediate Extrinsic Back Muscles (Erector Spinae) Medial border of the scapula (superior to the spine of the scapula) Posterior tubercles of the transverse processes C1-C4 Medial border of scapula at spine of scapula

Assist the serratus anterior in holding the scapula against the thoracic wall.

Retraction and downward rotation of scapula.

Medial border of scapula inferior to spine of scapula

Depression of scapula (lowering shoulder)ДЇloor of intertubercular groove of the humerusД®xtends, adducts and medially rotates the humerus