Thermal referral : evidence for a thermoceptive uniformity illusion without touch. / Cataldo, Antonio; Ferre, Elisa; Di Pellegrino, Giuseppe ; Haggard, Patrick.

In: Scientific Reports, 24.10.2016, p. 1-10.

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Thermal referral : evidence for a thermoceptive uniformity illusion without touch. / Cataldo, Antonio; Ferre, Elisa; Di Pellegrino, Giuseppe ; Haggard, Patrick.

In: Scientific Reports, 24.10.2016, p. 1-10.

Research output: Contribution to journalArticle

Harvard

Cataldo, A, Ferre, E, Di Pellegrino, G & Haggard, P 2016, 'Thermal referral: evidence for a thermoceptive uniformity illusion without touch', Scientific Reports, pp. 1-10. https://doi.org/10.1038/srep35286

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Cataldo, Antonio ; Ferre, Elisa ; Di Pellegrino, Giuseppe ; Haggard, Patrick. / Thermal referral : evidence for a thermoceptive uniformity illusion without touch. In: Scientific Reports. 2016 ; pp. 1-10.

BibTeX

@article{ae5a58235858417985f8a9a60988dd67,
title = "Thermal referral: evidence for a thermoceptive uniformity illusion without touch",
abstract = "When warm thermal stimulators are placed on the ring and index fingers of one hand, and a neutral-temperature stimulator on the middle finger, all three fingers feel warm. This illusion is known as thermal referral (TR). On one interpretation, the heterogenous thermal signals are overridden by homogenous tactile signals. This cross-modal thermo-tactile interaction could reflect a process of object recognition, based on the prior that many objects are thermally homogenous. Interestingly, the illusion was reported to disappear when the middle digit was lifted off the thermal stimulator, suggesting that tactile stimulation is necessary. However, no study has investigated whether purely thermal stimulation might induce TR, without any tactile object to which temperature can be attributed. We used radiant thermal stimulation to deliver purely thermal stimuli, which either were or were not accompanied by simultaneous touch. We found identical TR effects in both the original thermo-tactile condition, and in a purely thermoceptive condition where no tactile object was present. Control experiments ruled out explanations based on poor spatial discrimination of warm signals. Our purely thermoceptive results suggest that TR could reflect low-level organization of the thermoceptive pathway, rather than a cognitive intermodal modulation based on tactile object perception.",
author = "Antonio Cataldo and Elisa Ferre and {Di Pellegrino}, Giuseppe and Patrick Haggard",
year = "2016",
month = "10",
day = "24",
doi = "10.1038/srep35286",
language = "English",
pages = "1--10",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",

}

RIS

TY - JOUR

T1 - Thermal referral

T2 - evidence for a thermoceptive uniformity illusion without touch

AU - Cataldo, Antonio

AU - Ferre, Elisa

AU - Di Pellegrino, Giuseppe

AU - Haggard, Patrick

PY - 2016/10/24

Y1 - 2016/10/24

N2 - When warm thermal stimulators are placed on the ring and index fingers of one hand, and a neutral-temperature stimulator on the middle finger, all three fingers feel warm. This illusion is known as thermal referral (TR). On one interpretation, the heterogenous thermal signals are overridden by homogenous tactile signals. This cross-modal thermo-tactile interaction could reflect a process of object recognition, based on the prior that many objects are thermally homogenous. Interestingly, the illusion was reported to disappear when the middle digit was lifted off the thermal stimulator, suggesting that tactile stimulation is necessary. However, no study has investigated whether purely thermal stimulation might induce TR, without any tactile object to which temperature can be attributed. We used radiant thermal stimulation to deliver purely thermal stimuli, which either were or were not accompanied by simultaneous touch. We found identical TR effects in both the original thermo-tactile condition, and in a purely thermoceptive condition where no tactile object was present. Control experiments ruled out explanations based on poor spatial discrimination of warm signals. Our purely thermoceptive results suggest that TR could reflect low-level organization of the thermoceptive pathway, rather than a cognitive intermodal modulation based on tactile object perception.

AB - When warm thermal stimulators are placed on the ring and index fingers of one hand, and a neutral-temperature stimulator on the middle finger, all three fingers feel warm. This illusion is known as thermal referral (TR). On one interpretation, the heterogenous thermal signals are overridden by homogenous tactile signals. This cross-modal thermo-tactile interaction could reflect a process of object recognition, based on the prior that many objects are thermally homogenous. Interestingly, the illusion was reported to disappear when the middle digit was lifted off the thermal stimulator, suggesting that tactile stimulation is necessary. However, no study has investigated whether purely thermal stimulation might induce TR, without any tactile object to which temperature can be attributed. We used radiant thermal stimulation to deliver purely thermal stimuli, which either were or were not accompanied by simultaneous touch. We found identical TR effects in both the original thermo-tactile condition, and in a purely thermoceptive condition where no tactile object was present. Control experiments ruled out explanations based on poor spatial discrimination of warm signals. Our purely thermoceptive results suggest that TR could reflect low-level organization of the thermoceptive pathway, rather than a cognitive intermodal modulation based on tactile object perception.

U2 - 10.1038/srep35286

DO - 10.1038/srep35286

M3 - Article

SP - 1

EP - 10

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

ER -