From the University of Essen, Department of Neurology, Germany (Drs. Katsarava, Ayzenberg, Sack, Limmroth, and Diener); Institute of Neurology, The National Hospital for Neurology and Neurosurgery, Queen Square, London, UK (Dr. Kaube).
A Novel Method of Eliciting Pain-Related Potentials by Transcutaneous Electrical Stimulation
Article first published online: 29 MAR 2006
Headache: The Journal of Head and Face Pain
Volume 46, Issue 10, pages 1511–1517, November/December 2006
How to Cite
Katsarava, Z., Ayzenberg, I., Sack, F., Limmroth, V., Diener, H.-C. and Kaube, H. (2006), A Novel Method of Eliciting Pain-Related Potentials by Transcutaneous Electrical Stimulation. Headache: The Journal of Head and Face Pain, 46: 1511–1517. doi: 10.1111/j.1526-4610.2006.00446.x
- Issue published online: 29 MAR 2006
- Article first published online: 29 MAR 2006
- Accepted for publication January 25, 2006.
- pain-related evoked potentials;
- trigeminal nociception;
- concentric electrode
Background.—Electrophysiological techniques such as laser and contact heat evoked pain-related potentials are very useful for studying trigeminal and somatic pain transmission in humans. These methods are, however, partly invasive, expensive, and therefore not available for broad clinical use. We recently proposed a novel technique of noninvasive transcutaneous electrical stimulation.
Objective.—To elicit pain-related evoked potentials (PREP) by using a concentric planar electrode and demonstrate their nociceptive specificity.
Methods.—We registered PREP following stimulation of the forehead and hand in 14 healthy volunteers. Latencies, peak-to-peak amplitudes, and conduction velocities of nociceptive fibers have been estimated. Effects of temporal and spatial summation and of cutaneous anesthesia were evaluated.
Results.—Stimulation with the concentric planar electrode produced pinprick-like painful sensation. Cutaneous anesthesia led to abolishment of PREP responses. Estimated mean conduction velocity was 11.61 ± 5.12 m/s, which corresponded well with conduction via A-delta fibers. Spatial as well as temporal summation resulted in a parallel increase of perceived pain intensity and PREP amplitudes.
Conclusion.—The technique is noninvasive, affordable, and easy to perform and allows quantitative assessment of human nociceptive pathways.