part of part of innervated by innervated_by develops from develops from musculature skeletal muscle of trunk hypaxial myotome region mesoderm-derived structure musculature of trunk ventral ramus of spinal nerve hypaxial musculature AAO:0000228 hypaxial muscle Musculature that is derived from the hypaxial myotome region, trunk muscles that lie ventral to the horizontal septum of the vertebrae. Hypaxial muscles include some vertebral muscles, the diaphragm, the abdominal muscles, and all limb muscles. UBERON:0008777 Wikipedia:Epaxial_and_Hypaxial_muscles XAO:0003228