Fig. 2From: Quantitative magnetic resonance imaging of the upper trapezius muscles – assessment of myofascial trigger points in patients with migraineT2 values of the upper trapezius muscles and myofascial trigger points (mTrPs). The graphs show the T2 values (in ms) of each subject derived from the regions of interest (ROIs) enclosing the trapezius muscles and signal alterations attributed to mTrPs of the right and left side, respectively. Measurements in trapezius muscles were obtained in all subjects bilaterally, whereas measurements of T2 values of signal alterations attributed to mTrPs were achieved in nine subjects per side, respectively (due to missing detectable signal alterations in the remaining subjects). Horizontal lines represent the mean with the standard deviation (SD). A statistically significant difference was observed between measurements for both sides, respectively (p = 0.0039)Back to article page