has muscle origin has muscle origin has muscle insertion has muscle insertion neural spine transverse process of vertebra splenius splenius cervicis http://upload.wikimedia.org/wikipedia/commons/2/26/Musculus_splenius_cervicis.PNG UBERON:0008544 splenius cervicis muscle musculus splenius cervicis A muscle that arises from the spinous processes of the third to the sixth thoracic vertebrae and inserts into the posterior tubercles of the transverse processes of the upper two or three cervical vertebrae[WP,modified]. Bilaterally: Extend the head & neck, Unilaterally: Lateral flexion to the same side, Rotation to the same side. FMA:22681 Wikipedia:Splenius_cervicis_muscle