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Whole-hand perceptual maps of joint location

Myga, Kasia A., Ambroziak, Klaudia B., Tamè, Luigi, Farnè, Alessandro, Longo, Matthew R. (2021) Whole-hand perceptual maps of joint location. Experimental Brain Research, 239 (4). pp. 1235-1246. ISSN 0014-4819. (doi:10.1007/s00221-021-06043-6) (KAR id:91111)

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Hands play a fundamental role in everyday behaviour. Nevertheless, healthy adults show striking misrepresentations of their hands which have been documented by a wide range of studies addressing various aspects of body representation. For example, when asked to indicate the location within the hand of the knuckles, people place them substantially farther forward than they actually are. Previous research, however, has focused exclusively on the knuckles at the base of each finger, not considering the other knuckles in the fingers. This study therefore aimed to investigate conceptual knowledge of the structure of the whole hand, by investigating judgements of the location of all 14 knuckle joints in the hand. Participants localised each of the 14 knuckles of their own hand (Experiment 1) or of the experimenter’s hand (Experiment 2) on a hand silhouette. We measured whether there are systematic localisation biases. The results showed highly similar pattern of mislocalisation for the knuckles of one’s own hand and those of another person’s hand, suggesting that people share an abstract conceptual knowledge about the hand structure. In line with previous reports, we showed that the metacarpophalangeal joints at the base of the fingers are judged as substantially father forward in the hand than they actually are. Moreover, for the first time we showed a gradient of this bias, with progressive reduction of distal bias from more proximal to more distal joints. In sum, people think their finger segments are roughly the same, and that their fingers are shorter than they are.

Item Type: Article
DOI/Identification number: 10.1007/s00221-021-06043-6
Uncontrolled keywords: body representation, conceptual knowledge, hand, metacarpophalangeal joints
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Divisions: Divisions > Division of Human and Social Sciences > School of Psychology
Depositing User: Luigi Tame
Date Deposited: 27 Oct 2021 08:45 UTC
Last Modified: 16 Feb 2022 00:00 UTC
Resource URI: (The current URI for this page, for reference purposes)
Tamè, Luigi:
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