Investigating event-related brain potentials elicited by high-speed heating using a contact thermode

Kuzminova, Avgustina;Legrain, Valéry;et.al.
(2023) IoNS Young Researcher Day (UCLouvain Bruxelles-Woluwé) — Location: Brussels, Belgium (20.April.2023)

Files

No attached file found for this publication.

Details

Authors
Abstract
Introduction: Warm stimuli applied over a larger skin surface area are more easily detected and elicit stronger sensations due to spatial summation.Thermosensation is therefore necessary to examine the environment and detect threatening stimuli induced by noxious heat. The synchronous and phasic activation of skin receptors is observed in contact-heat evoked potentials (CHEPs) with scalp electroencephalography (EEG) by using a contact-heat probe that selectively targets Aδ- and C- skin nociceptors The aim of the study is to identify how stimulation area impacts thermal detection processes by evaluating whether decreasing the stimulation area still provides sufficient detection of warm stimuli. Methods: CHEPs elicited by a high-speed contact-thermode, applied to the volar forearm with individually controlled micro-Peltier elements and a steep heating ramp of 300°C/s, will be compared on three different stimulation surfaces (23 mm², 46 mm², and 116 mm²). Results: Elicited responses of 15 healthy individuals and their capacity to perceive warm stimuli will be analysed, while assessing their signal-to-noise ratio and comparing their perception to nociceptive stimuli. CHEPs are expected to be reduced in amplitude and delayed in latency for a smaller stimulation surface, and the proportion of detection of warm stimuli is also expected to be decreased. Discussion: Nevertheless, results of this study should provide sufficient evidence that a probe with a smaller stimulation surface would still be able to elicit CHEPs. Thus, a smaller probe could be used as an alternative for future experiments involving a temporal order judgement task on the hands' dorsum where a small stimulation surface is required, for instance.
Affiliations

Citations

  • APA
  • Chicago
  • FWB

Kuzminova, A., & et al. (2023). Investigating event-related brain potentials elicited by high-speed heating using a contact thermode. https://hdl.handle.net/2078.5/25672