Figure 5: The superficial fascia and the lateral intermuscular septum (LIS) in the lateral aspect of the arm and forearm. The superficial fascia (red arrow) in the lateral aspect of the arm was connected to the LIS (black arrow) by thick strands of white fibres (green arrow). This superficial fascia in the arm was continuous with the thin superficial fascia in posterior proximal third of the forearm (blue arrow).