Figure 4.
Ultrasound anatomy of the flexor digitorum superficialis (FDS) with key landmarks: FCR—flexor carpi radialis; FDS3—flexor digitorum superficialis digit 3; FDS2—flexor digitorum superficialis digit 2; IF—intermuscular fascia; FDP—flexor digitorum profundus; IOM—interosseous membrane; MN—median nerve.
