Table 7 Overview test 13–15

Test 13 (monofilaments): a QST test to assess temporal summation and slowly repeated evoked pain (SREP) using monofilaments of different weights [9]. A monofilament is a thick thread which gives a pricking sensation when applied to the skin. To measure temporal summation, the monofilament is applied several times with a time interval, e.g. 10 times with a time interval of one second. In case of CS we expect a stronger increase in pain after applying the monofilament then in healthy controls due to temporal summation.

Test 14 (clothes peg): a QST test with a calibrated clothes peg to measure pressure pain [39]. A calibrated clothes peg is applied for 10 s and patients rate the pain intensity on a 0 to 10 numerical rating scale, the clothes peg is applied on the middle fingers or earlobe. In case of CS we expect a higher pain intensity then in healthy controls.

Test 15 (the Sensory Hypersensitivity Scale (SHS)): a 25-item self-report measure of sensory hypersensitivity. The SHS assesses both general sensitivity and modalityspecific sensitivity (e.g. touch, taste, and hearing) [40].