دورية أكاديمية
Systematic underestimation of human hand weight.
| العنوان: | Systematic underestimation of human hand weight. |
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| المؤلفون: | Ferrè ER; Department of Psychological Sciences, Birkbeck, University of London, London, UK., Joel J; Department of Psychological Sciences, Birkbeck, University of London, London, UK; Department of Psychology, University of Westminster, London, UK., Cadete D; Department of Psychological Sciences, Birkbeck, University of London, London, UK., Longo MR; Department of Psychological Sciences, Birkbeck, University of London, London, UK. Electronic address: m.longo@bbk.ac.uk. |
| المصدر: | Current biology : CB [Curr Biol] 2023 Jul 24; Vol. 33 (14), pp. R758-R759. |
| نوع المنشور: | Journal Article; Research Support, Non-U.S. Gov't |
| اللغة: | English |
| بيانات الدورية: | Publisher: Cell Press Country of Publication: England NLM ID: 9107782 Publication Model: Print Cited Medium: Internet ISSN: 1879-0445 (Electronic) Linking ISSN: 09609822 NLM ISO Abbreviation: Curr Biol Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: Cambridge, MA : Cell Press Original Publication: London, UK : Current Biology Ltd., c1991- |
| مواضيع طبية MeSH: | Hand* , Amputees*, Adult ; Humans ; Muscles/physiology ; Sensory Receptor Cells ; Fatigue |
| مستخلص: | According to Newton's laws, the weight of a body part is equal to its mass times gravitational acceleration. Our experience of body part weight, however, is constructed by the central nervous system. No sensory receptors directly specify the weight of body parts, and the factors influencing perceived weight remain unknown. The perceived weight of held objects has been linked to sensations of the magnitude of central motor commands sent to the muscles, what Helmholtz called the effort of will and has subsequently been called the sense of effort 1 . The link between the sense of effort and the perceived weight of objects is shown by studies demonstrating that held weights feel heavier when muscles are weakened by fatigue 1 , anaesthesia 2 , and following brain damage 3 . Similar drive to muscles is required to counteract the force of gravity on the limbs themselves, though few studies have investigated the perceived weight of body parts 4 . Stroke patients with hemiplegia frequently comment that their limbs feel heavy 5 , an effect linked to fatigue in the affected limb 6 . Similarly, amputees commonly complain of the weight of prosthetic limbs 7 , despite these typically weighing less than actual limbs. Here we report that healthy adult humans systematically underestimate hand weight. We used a psychophysical matching task to measure the experience of hand weight, which was underestimated on average by 49.4%. We further found that experimental induction of hand fatigue causes a systematic increase in perceived hand weight. Our results demonstrate that humans fail to experience the full weight of their body. Competing Interests: Author contributions E.R.F. and M.R.L. conceived the study and designed the experiments. All authors constructed equipment. J.J. and D.C. collected the data. All authors analysed the data. E.R.F. and M.R.L. wrote the paper. All authors approved the final version of the paper. The editors of Current Biology welcome correspondence on any article in the journal, but reserve the right to reduce the length of any letter to be published. All correspondence containing data or scientific argument will be refereed. Queries about articles for consideration in this format should be sent by e-mail to cbiol@current-biology.com (Copyright © 2023 The Author(s). Published by Elsevier Inc. All rights reserved.) |
| معلومات مُعتمدة: | United Kingdom WT_ Wellcome Trust |
| تواريخ الأحداث: | Date Created: 20230725 Date Completed: 20230727 Latest Revision: 20230729 |
| رمز التحديث: | 20240628 |
| DOI: | 10.1016/j.cub.2023.05.041 |
| PMID: | 37490859 |
| قاعدة البيانات: | MEDLINE |
| تدمد: | 1879-0445 |
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| DOI: | 10.1016/j.cub.2023.05.041 |