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

Table 1

The SP test® results of the healthy subjects depend on the latent trigger points presence.

The SP test® gluteus minimus muscle	Parameter description	The size of amplified vasodilatation, which covered lower leg (%)
		LTrPs	Control
End of stimulation (10′ of the test)	Median (Q1, Q3)
	Average ± SD	6.9 ±	1.1 ±
End of observation at rest (16′ of the test)	Median (Q1, Q3)
	Average ± SD	11.1 ±	0.8 ±

LTrPs, latent trigger points; Q1 and Q3, first and third quartile; SD, standard deviation; , Mann–Whitney U test.