From a Somatotopic to a Spatiotopic Frame of Reference for the Localization of Nociceptive Stimuli

PloS One
Annick L De PaepeValéry Legrain

Abstract

To react efficiently to potentially threatening stimuli, we have to be able to localize these stimuli in space. In daily life we are constantly moving so that our limbs can be positioned at the opposite side of space. Therefore, a somatotopic frame of reference is insufficient to localize nociceptive stimuli. Here we investigated whether nociceptive stimuli are mapped into a spatiotopic frame of reference, and more specifically a peripersonal frame of reference, which takes into account the position of the body limbs in external space, as well as the occurrence of external objects presented near the body. Two temporal order judgment (TOJ) experiments were conducted, during which participants had to decide which of two nociceptive stimuli, one applied to either hand, had been presented first while their hands were either uncrossed or crossed over the body midline. The occurrence of the nociceptive stimuli was cued by uninformative visual cues. We found that the visual cues prioritized the perception of nociceptive stimuli applied to the hand laying in the cued side of space, irrespective of posture. Moreover, the influence of the cues was smaller when they were presented far in front of participants' hands as compared to when th...Continue Reading

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Citations

Mar 17, 2018·Perception·Valéry LegrainLieve Filbrich
Feb 28, 2019·Journal of Neurophysiology·Viviana VersaceMarkus Kofler
Aug 31, 2017·Scientific Reports·Lieve FilbrichValéry Legrain
Jul 13, 2018·Frontiers in Psychology·Justine Cléry, Suliann Ben Hamed
Apr 11, 2020·PeerJ·Annick L De PaepeGeert Crombez
May 27, 2021·Attention, Perception & Psychophysics·Camille VanderclausenValéry Legrain

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Software Mentioned

R package “ Linear and Nonlinear Mixed Effects Models ”

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