serratus posterior superior (muscle)

ser·ra·tus pos·te·ri·or su·pe·ri·or (mus·cle)

[TA] upper intermediate muscle of back; origin, from spinous processes of two lower cervical and two upper thoracic vertebrae; insertion, into lateral side of angles of second to fifth ribs; nerve supply, first to fourth intercostals. Synonym(s): musculus serratus posterior superior [TA], superior posterior serratus muscle