1. Elevated detection thresholds for mechanical stimuli in chronic pain patients: Support for a central mechanism 
V.F. Voerman, MD, J. van Egmond, PhD, B.J.P. Crul, MD, PhD 
Archives of Physical Medicine and Rehabilitation 
Volume 81, Issue 4, Pages (April 2000)
DOI: /mr
Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

2. Fig. 1
Distribution of mean thresholds per patient (n = 39), compared with a normal group of 20 subjects. The mean thresholds per subject are constructed of the thresholds of the segments X − 11,2, X1,2, X + 11,2, x − 11,2, x1,2 and x + 11,2. Thresholds are expressed in log(10 × F). “Percentage” is the number of patients (or normal subjects) within the specific mean threshold range divided by all patients (or normal subjects) multiplied by 100%.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /mr )
Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

3. Fig. 2
Mean SWM thresholds and 95% confidence intervals in 39 patients: ●, side of pain; ■, contralateral. The dermatome corresponding with the pain-provoking segment (X), the dermatome above it (X − 1), the one below it (X + 1), and the contralateral dermatomes (x, x − 1, x + 1) were all tested at two sites. Results are presented in log(10 × F).
Archives of Physical Medicine and Rehabilitation  , DOI: ( /mr )
Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions