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. 2023 Feb 21;20(5):3838. doi: 10.3390/ijerph20053838

Figure 4.

Figure 4

US image (A) shows the multi-layered deep fascia (yellow arrowheads) located between the upper fibers of the trapezius muscle (Trap) and the subcutaneous tissue (S). Under real-time US guidance (B), the needle (yellow arrows) can be advanced within the fascial structure, dissecting its different layers and releasing perforating cutaneous branches (CBsDR). D: dermis.