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Theta burst stimulation applied over primary motor and somatosensory cortices produces analgesia unrelated to the changes in nociceptive event-related potentials

(2013) PLOS ONE. 8(8).
Author
Organization
Abstract
Continuous theta burst stimulation (cTBS) applied over the primary motor cortex (M1) can alleviate pain although the neural basis of this effect remains largely unknown. Besides, the primary somatosensory cortex (S1) is thought to play a pivotal role in the sensori-discriminative aspects of pain perception but the analgesic effect of cTBS applied over S1 remains controversial. To investigate cTBS-induced analgesia we characterized, in two separate experiments, the effect of cTBS applied either over M1 or S1 on the event-related brain potentials (ERPs) and perception elicited by nociceptive (CO2 laser stimulation) and non-nociceptive (transcutaneous electrical stimulation) somatosensory stimuli. All stimuli were delivered to the ipsilateral and contralateral hand. We found that both cTBS applied over M1 and cTBS applied over S1 significantly reduced the percept elicited by nociceptive stimuli delivered to the contralateral hand as compared to similar stimulation of the ipsilateral hand. In contrast, cTBS did not modulate the perception of non-nociceptive stimuli. Surprisingly, this side-dependent analgesic effect of cTBS was not reflected in the amplitude modulation of nociceptive ERPs. Indeed, both nociceptive (N160, N240 and P360 waves) and late-latency non-nociceptive (N140 and P200 waves) ERPs elicited by stimulation of the contralateral and ipsilateral hands were similarly reduced after cTBS, suggesting an unspecific effect, possibly due to habituation or reduced alertness. In conclusion, cTBS applied over M1 and S1 reduces similarly the perception of nociceptive inputs originating from the contralateral hand, but this analgesic effect is not reflected in the magnitude of nociceptive ERPs.
Keywords
LASER-EVOKED POTENTIALS, TRANSCRANIAL MAGNETIC STIMULATION, CHRONIC NEUROPATHIC PAIN, A-DELTA-FIBER, EEG RESPONSES, CEREBRAL POTENTIALS, BASIC PRINCIPLES, CORTEX, PERCEPTION, HUMANS

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Citation

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MLA
Torta, DME et al. “Theta Burst Stimulation Applied over Primary Motor and Somatosensory Cortices Produces Analgesia Unrelated to the Changes in Nociceptive Event-related Potentials.” PLOS ONE 8.8 (2013): n. pag. Print.
APA
Torta, D., Legrain, V., Algoet, M., Olivier, E., Duque, J., & Mouraux, A. (2013). Theta burst stimulation applied over primary motor and somatosensory cortices produces analgesia unrelated to the changes in nociceptive event-related potentials. PLOS ONE, 8(8).
Chicago author-date
Torta, DME, Valéry Legrain, M Algoet, E Olivier, J Duque, and A Mouraux. 2013. “Theta Burst Stimulation Applied over Primary Motor and Somatosensory Cortices Produces Analgesia Unrelated to the Changes in Nociceptive Event-related Potentials.” Plos One 8 (8).
Chicago author-date (all authors)
Torta, DME, Valéry Legrain, M Algoet, E Olivier, J Duque, and A Mouraux. 2013. “Theta Burst Stimulation Applied over Primary Motor and Somatosensory Cortices Produces Analgesia Unrelated to the Changes in Nociceptive Event-related Potentials.” Plos One 8 (8).
Vancouver
1.
Torta D, Legrain V, Algoet M, Olivier E, Duque J, Mouraux A. Theta burst stimulation applied over primary motor and somatosensory cortices produces analgesia unrelated to the changes in nociceptive event-related potentials. PLOS ONE. PUBLIC LIBRARY SCIENCE; 2013;8(8).
IEEE
[1]
D. Torta, V. Legrain, M. Algoet, E. Olivier, J. Duque, and A. Mouraux, “Theta burst stimulation applied over primary motor and somatosensory cortices produces analgesia unrelated to the changes in nociceptive event-related potentials,” PLOS ONE, vol. 8, no. 8, 2013.
@article{4346379,
  abstract     = {Continuous theta burst stimulation (cTBS) applied over the primary motor cortex (M1) can alleviate pain although the neural basis of this effect remains largely unknown. Besides, the primary somatosensory cortex (S1) is thought to play a pivotal role in the sensori-discriminative aspects of pain perception but the analgesic effect of cTBS applied over S1 remains controversial. To investigate cTBS-induced analgesia we characterized, in two separate experiments, the effect of cTBS applied either over M1 or S1 on the event-related brain potentials (ERPs) and perception elicited by nociceptive (CO2 laser stimulation) and non-nociceptive (transcutaneous electrical stimulation) somatosensory stimuli. All stimuli were delivered to the ipsilateral and contralateral hand. We found that both cTBS applied over M1 and cTBS applied over S1 significantly reduced the percept elicited by nociceptive stimuli delivered to the contralateral hand as compared to similar stimulation of the ipsilateral hand. In contrast, cTBS did not modulate the perception of non-nociceptive stimuli. Surprisingly, this side-dependent analgesic effect of cTBS was not reflected in the amplitude modulation of nociceptive ERPs. Indeed, both nociceptive (N160, N240 and P360 waves) and late-latency non-nociceptive (N140 and P200 waves) ERPs elicited by stimulation of the contralateral and ipsilateral hands were similarly reduced after cTBS, suggesting an unspecific effect, possibly due to habituation or reduced alertness. In conclusion, cTBS applied over M1 and S1 reduces similarly the perception of nociceptive inputs originating from the contralateral hand, but this analgesic effect is not reflected in the magnitude of nociceptive ERPs.},
  articleno    = {e73263},
  author       = {Torta, DME and Legrain, Valéry and Algoet, M and Olivier, E and Duque, J and Mouraux, A},
  issn         = {1932-6203},
  journal      = {PLOS ONE},
  keywords     = {LASER-EVOKED POTENTIALS,TRANSCRANIAL MAGNETIC STIMULATION,CHRONIC NEUROPATHIC PAIN,A-DELTA-FIBER,EEG RESPONSES,CEREBRAL POTENTIALS,BASIC PRINCIPLES,CORTEX,PERCEPTION,HUMANS},
  language     = {eng},
  number       = {8},
  pages        = {15},
  publisher    = {PUBLIC LIBRARY SCIENCE},
  title        = {Theta burst stimulation applied over primary motor and somatosensory cortices produces analgesia unrelated to the changes in nociceptive event-related potentials},
  url          = {http://dx.doi.org/10.1371/journal.pone.0073263},
  volume       = {8},
  year         = {2013},
}

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