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Ultrasound (US) images of the deep fascia of: the anterior region of the arm (A) and of the forearm (C); the posterior region of the arm (B) and of the forearm (D). Anterior region (A,C) at the levels Ant 1 (a,e) and Ant 2 (b,f). Posterior region (B,D) at levels Post 1 (c,g) and Post 2 (d,h). Probe: black rectangle. Red dashes: deep fascia. Reprinted with permission from [14].
