The "lumbrical plus" finger.
D005384:Finger Joint; D005385:Fingers / Q000033:anatomy & histology; D006225:Hand / Q000033:anatomy & histology; D006227:Hand Deformities, Acquired / Q000601:surgery*; D006801:Humans; D009132:Muscles / Q000503:physiopathology* / Q000601:surgery; D013710:Tendons / Q000637:transplantation