part of part of has muscle origin has muscle origin has muscle insertion has muscle insertion system rotator muscle of the vertebral column rotator muscle SCTID:244872002 FMA:23081 UBERON:0000951 Any of a number of short transversospinal muscles chiefly developed in cervical, lumbar, and thoracic regions, arising from the transverse process of one vertebra and inserted into the root of the spinous process of the next two or three vertebrae above, with nerve supply from the dorsal branches of the spinal nerve, and whose actions rotate the vertebral column. neural spine transverse process of vertebra dorsum muscle organ dorsal region element