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Gepubliceerd in: Psychological Research 6/2022

13-11-2021 | Original Article

Diametrical modulation of tactile and visual perceptual thresholds during the rubber hand illusion: a predictive coding account

Auteurs: Alice Rossi Sebastiano, Valentina Bruno, Irene Ronga, Carlotta Fossataro, Mattia Galigani, Marco Neppi-Modona, Francesca Garbarini

Gepubliceerd in: Psychological Research | Uitgave 6/2022

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Abstract

During the rubber hand illusion (RHI), the synchronous stroking of the participants’ concealed hand and a visible rubber hand induces a conflict among visuo-tactile inputs, leading healthy subjects to perceive the illusion of being touched on the rubber hand, as if it were part of their body. The predictive coding theory suggests that the RHI emerges to settle the conflict, attenuating somatosensory inputs in favour of visual ones, which “capture” tactile sensations. Here, we employed the psychophysical measure of perceptual threshold to measure a behavioural correlate of the somatosensory and visual modulations, to better understand the mechanisms underpinning the illusion. Before and after the RHI, participants underwent a tactile (Experiment 1) and a visual (Experiment 2) task, wherein they had to detect stimuli slightly above the perceptual threshold. According to the predictive coding framework, we found a significant decrease of tactile detection (i.e. increased tactile perceptual threshold) and a significant increase of visual detection (i.e.  decreased visual perceptual threshold), suggesting a diametrical modulation of somatosensory and visual perceptual processes. These findings provide evidence of how our system plastically adapts to uncertainty, attributing different weights to sensory inputs to restore a coherent representation of the own body.
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Literatuur
go back to reference Bisiach, E., & Vallar, G. (2000). Unilateral neglect in humans. In Handbook of Neuropsychology (pp. 459–502). Bisiach, E., & Vallar, G. (2000). Unilateral neglect in humans. In Handbook of Neuropsychology (pp. 459–502).
go back to reference Fossataro, C., Gindri, P., Mezzanato, T., Pia, L., & Garbarini, F. (2016). Bodily ownership modulation in defensive responses: Physiological evidence in brain-damaged patients with pathological embodiment of other’s body parts. Scientific Reports, 6, 1–11. https://doi.org/10.1038/srep27737CrossRef Fossataro, C., Gindri, P., Mezzanato, T., Pia, L., & Garbarini, F. (2016). Bodily ownership modulation in defensive responses: Physiological evidence in brain-damaged patients with pathological embodiment of other’s body parts. Scientific Reports, 6, 1–11. https://​doi.​org/​10.​1038/​srep27737CrossRef
go back to reference Friston, K. J. (2011). Embodied inference: or “I think therefore I am, if I am what I think”. The Implications of Embodiment (Cognition and Communication), 89–125. Friston, K. J. (2011). Embodied inference: or “I think therefore I am, if I am what I think”. The Implications of Embodiment (Cognition and Communication), 89–125.
go back to reference Gescheider, G. A. (1997). The classical psychofisical methods. Psychophysics: The fundamentals (3rd ed., pp. 45–72). Lawrence Erlbaum Associates. Gescheider, G. A. (1997). The classical psychofisical methods. Psychophysics: The fundamentals (3rd ed., pp. 45–72). Lawrence Erlbaum Associates.
go back to reference Ronga, I., Sarasso, P., Fossataro, C., Salatino, A., Garbarini, F., Ricci, R., & Neppi-Modona, M. (2018). Everything is illuminated: Prismatic adaptation lowers visual detection threshold in normal subjects. Journal of Experimental Psychology: Human Perception and Performance, 44(10), 1619–1628. https://doi.org/10.1037/xhp0000559CrossRefPubMed Ronga, I., Sarasso, P., Fossataro, C., Salatino, A., Garbarini, F., Ricci, R., & Neppi-Modona, M. (2018). Everything is illuminated: Prismatic adaptation lowers visual detection threshold in normal subjects. Journal of Experimental Psychology: Human Perception and Performance, 44(10), 1619–1628. https://​doi.​org/​10.​1037/​xhp0000559CrossRefPubMed
go back to reference Sarasso, P., Ninghetto, M., Salatino, A., Ronga, I., Iarrobino, I., Neppi-modona, M., & Ricci, R. (2018). Everything is (still) illuminated: dual right cathodal-left anodal tDCS of PPC prevents fatigue on a visual detection task. Brain Stimulation. Sarasso, P., Ninghetto, M., Salatino, A., Ronga, I., Iarrobino, I., Neppi-modona, M., & Ricci, R. (2018). Everything is (still) illuminated: dual right cathodal-left anodal tDCS of PPC prevents fatigue on a visual detection task. Brain Stimulation.
go back to reference Stanislaw, H. (1999). Calculation of signal detection theory measures. Behavior Research Methods, Instruments, & Computers, 95382(1), 137–149.CrossRef Stanislaw, H. (1999). Calculation of signal detection theory measures. Behavior Research Methods, Instruments, & Computers, 95382(1), 137–149.CrossRef
Metagegevens
Titel
Diametrical modulation of tactile and visual perceptual thresholds during the rubber hand illusion: a predictive coding account
Auteurs
Alice Rossi Sebastiano
Valentina Bruno
Irene Ronga
Carlotta Fossataro
Mattia Galigani
Marco Neppi-Modona
Francesca Garbarini
Publicatiedatum
13-11-2021
Uitgeverij
Springer Berlin Heidelberg
Gepubliceerd in
Psychological Research / Uitgave 6/2022
Print ISSN: 0340-0727
Elektronisch ISSN: 1430-2772
DOI
https://doi.org/10.1007/s00426-021-01608-0

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