Fig 3. Transverse sonogram of the inner aspect of the proximal thigh 3 cm distal to the inguinal crease showing the adductor muscles and the divisions of the obturator nerve. (B) Annotated structures identified in (A). Abbreviations: AL m., adductor longus muscle; AB m., adductor brevis muscle; AM m., adductor magnus muscle. Yellow : anterior division (above); posterior division (below).