Fig. 1. ( A ) Schematic diagram showing the location of midgluteal, subgluteal, midfemoral, and popliteal sciatic nerve. ( B ) Representative reconstructions perpendicular to the long axis of the sciatic nerve demonstrating how measurements were conducted. ( 1 ) Original image; ( 2 ) demarcated total epineurial tissue ( shaded in gray ); ( 3 ) demarcated neural tissue, that is, perineurium and nerve fascicles ( black dots ); and ( 4 ) combined image showing both measurements superimposed.