Pain Processing and Vegetative Dysfunction in Fibromyalgia: A Study by Sympathetic Skin Response and Laser Evoked Potentials

Table 4

Mean and standard deviations of sympathetic skin response latencies (ms), amplitudes (µV), and habituation index (%) in control subjects and fibromyalgia (FM) patients. The results of Student’s -test for unpaired data are reported.

Diagnosis	Hand; ms	Foot; ms	Hand; µV	Foot; µV	Hand; habituation; %	Foot; habituation; %
Controls
Mean	1294.64	1989.05	263.84	98.45	100	86
SD	333.60	373.69	214.41	70.80	46	44
Number	29.00	29.00	30.00	30.00	29.00	29.00
FM
Mean	1575.32	2187.45	278.65	94.66	110	89
SD	311.84	423.58	180.47	81.88	43	36
N°	49.00	42.00	50.00	50.00	49.00	42.00
Student’s -test
	3.74	2.034	0.33	0.21	0.94	0.86
	<0.0001	0.046	n.s.	n.s.	n.s.	n.s.