transversospinales transversospinales the transversospinales are a group of muscles of the human back. their combined action is rotation and extension of the vertebral column. these muscles are small and have a poor mechanical advantage for contributing to motion. they include: the three semispinalis muscles, spanning 4-6 vertebral segments semispinalis thoracis semispinalis cervicis semispinalis capitis multifidus, spanning 2-4 vertebral segments rotatores, spanning 1-2 vertebral segments rotatores cervicis rotatores thoracis rotatores lumborum transversospinalessection of the neck at about the level of the sixth cervical vertebra. showing the arrangement of the fascia coli.deep muscles of the back.detailsorigintransverse processinsertionspinous processnerveposterior ramus of spinal nerveactionsextend vertebral column (bilateral contraction); rotate vertebral column (unilateral contraction) antagonist =identifierslatinmusculi transversospinalesta98a04.3.02.201ta22275fma71304anatomical terms of muscle