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The self-perceived body size in obesity: Evidence from the implicit representation of the hand. | LitMetric

AI Article Synopsis

  • The study examined how individuals perceive their hand dimensions (size and shape) and whether this perception is affected by obesity.
  • Researchers compared the implicit representation of hand sizes between individuals with obesity and healthy weight individuals using tasks that measure body estimation and tactile sensitivity.
  • The results showed that both groups had similar estimations of hand dimensions, suggesting that obesity does not alter the way the body model is represented in terms of hand size perception, and tactile acuity was consistent across both groups.

Article Abstract

To locate our body in the space, we rely on an implicit representation of body size and shape: the . Evidence about the implicit representation of bodily dimensions in obesity is rare. Nevertheless, it seems to suggest that such representation is not altered in obesity compared to healthy weight individuals. To probe further this hypothesis, we investigated the implicit representation of hand dimensions with a landmark localisation task, comparing individuals with obesity and healthy weight individuals. Furthermore, as body model distortions may be related to tactile acuity, the tactile acuity threshold was measured using a two-point discrimination task. In accordance with the previous evidence, we observed that healthy weight participants showed a significant estimation of finger length and estimation of hand width. Interestingly, comparable body model distortions were shown also in participants with obesity. No differences in tactile acuity emerged between the two groups; also, when considering the whole sample, as tactile acuity decreases hand width overestimation increases. Thus, obesity seems to have no effect on the characteristics of the body model relative to the hand. Accordingly, the physiological mechanisms supporting the development of the implicit representation of hand dimensions in the healthy weight population may be preserved in obesity.

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Source
http://dx.doi.org/10.1177/1747021820985441DOI Listing

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