thoracic intertransversarii (muscles)

tho·rac·ic in·ter·trans·ver·sa·ri·i (mus·cles)

[TA] deep muscles of upper back; origin, transverse processes of thoracic vertebrae; insertion, next superior transverse process; action, abducts thoracic vertebrae; nerve supply, dorsal primary rami of thoracic nerves. Synonym(s): musculi intertransversarii thoracis [TA], thoracic intertransverse muscles