Conclusions: According to the acquired results, we conclude that IZ and MTrPs are located in well-defined areas in upper trapezius muscle. Moreover, MTrPs in upper trapezius are proximally located ...

trapezius distalis and m. serratus anterior on the convex side appeared to be weaker compared to concave side, and m. rhomboideus on the concave side appeared to be weaker compared to convex side.