Nociceptive and non-nociceptive steady-state evoked potentials tag distinct cortical network.
(2011) Laser Talks — Location: Alborg, Denmark
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- Abstract
- The periodic presentation of a sensory stimulus induces, at certain frequencies of stimulation, a sustained electroencephalographic response known as steady-state evoked potentials (SSEP). In the present study we characterize and compare SSEPs elicited by the selective electrical activation of nociceptive Aδ-fibers and non-nociceptive Aβ-fibers.Consistent nociceptive and non-nociceptive SSEPs were recorded at all stimulation frequencies. Whereas non-nociceptive SSEPs were maximal over the parietal region contralateral to the stimulated side, nociceptive SSEPs were maximal at the vertex and symmetrically distributed over both hemispheres, thus indicating that the two responses reflect the entrainment of distinct neuronal populations. For both types of SSEPs, the signal-to-noise was smaller at 7 and 13 Hz, possibly because of background alpha-band activity. Unlike conventional nociceptive event-related potentials, nociceptive SSEPs did not habituate, suggesting that they reflect more obligatory stages of sensory processing.
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Colon, E., Nozaradan, S., Legrain, V., & Mouraux, A. (2011). Nociceptive and non-nociceptive steady-state evoked potentials tag distinct cortical network. Laser Talks, Alborg, Denmark. https://hdl.handle.net/2078.5/51571