semispinalis thoracis (muscle)

(redirected from semispinal muscle of thorax)
Also found in: Dictionary, Thesaurus, Encyclopedia.

sem·i·spi·na·lis tho·ra·cis (mus·cle)

origin, transverse processes of fifth to eleventh thoracic vertebrae; insertion, spinous processes of first four thoracic and fifth and seventh cervical vertebrae; action, extends vertebral column; nerve supply, dorsal primary rami of cervical and thoracic spinal nerves.