part of part of innervated by innervated_by overlaps overlaps dorsum splenius Wikipedia:Splenius EMAPA:37701 A superficial postvertebral muscle innervated by the posterior ramus of the cervical spinal nerve with origins in the upper thoracic and lower cervical spinous processes whose actions are to extend and ipsilaterally rotate the head and neck. Examples: splenius capitis, splenius cervicis. splenius muscle FMA:77180 MA:0002382 NCIT:C53177 UBERON:0002252 Muscle of neck in MA UMLS:C1185944 muscle of back muscle of vertebral column dorsal ramus of spinal nerve dorsal part of neck