Pain wind-up is the perceived increase in pain intensity over time when a given stimulus is delivered repeatedly above a critical rate. It is caused by repeated stimulation of group C peripheral nerve fibers, leading to progressively increasing electrical response in the corresponding spinal cord (posterior horn) neurons due to priming of the NMDA receptor based response. It describes an exponentially progressive increase in firing of WDR neurons with repeated stimulation.
- Feng Xu; Tianjian Lu (29 May 2011). Introduction to Skin Biothermomechanics and Thermal Pain. Springer. p. 347. ISBN 978-3-642-13201-8. Retrieved 25 April 2012.
- Pitcher and Henry (2000). Eur. J. Neurosci., 12:2006–2020.