Learned control over spinal nociception: Transfer and stability of training success in a long-term study

Publication date: Available online 6 October 2017
Source:Clinical Neurophysiology
Author(s): Maximilian Bäumler, Moritz Feller, Stefanie Krafft, Manuela Schiffer, Jens Sommer, Andreas Straube, Fabian Weinges, Ruth Ruscheweyh
ObjectiveHealthy subjects can learn to use cognitive-emotional strategies to suppress their spinal nociception, quantified by the nociceptive flexor reflex (RIII reflex), when given visual RIII feedback. This likely reflects learned activation of descending pain inhibition. Here, we investigated if training success persists 4 and 8 months after the end of RIII feedback training, and if transfer (RIII suppression without feedback) is possible.Methods18 and 8 subjects who had successfully completed feedback training were investigated 4 and 8 months later.ResultsAt 4 months, RIII suppression during feedback and transfer was similar to that achieved at the final RIII feedback training session (to 50±22%, 53±21% and 52±21% of baseline, all differences n.s.). At 8 months, RIII suppression was somewhat (not significantly) smaller in the feedback run (to 64±17%) compared to the final training session (56±19%). Feedback and transfer runs were similar (to 64±17% vs. 68±24%, n.s.). Concomitant reductions in pain intensity ratings were stable at 4 and 8 months.ConclusionsRIII feedback training success was completely maintained after 4 months, and somewhat attenuated 8 months after training. Transfer was successful.SignificanceThese results are an important pre-requisite for application of RIII feedback training in the context of clinical pain.



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