A Potential Objective Sign of Central Sensitization: Referred Pain Elicited by Manual Gluteus Minimus Muscle Exploration is Coincident with Pathological Autonomic Response Provoked by Noxious Stimulation

Figure 5

MATLAB trends of the development of the average temperature changes compared to the cutoff point as observed during the SP test® depend on the examined group and time of the procedure 4: (a) median value, (b) average value, and (c) Mann–Whitney U test results. The control group was characterized by the temperature decrease, which confirmed the lack of abnormal autonomic phenomenon in this group (the conditions of the positive the SP test® for vasodilatation: (i) development of a new thermal subarea above the cutoff; (ii) ΔT increase of more than 0.3°C as compared to the cutoff point).

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