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Organized Toe Maps in Extreme Foot Users

Dempsey-Jones, H; Wesselink, D; Friedman, J; Makin, TR; (2019) Organized Toe Maps in Extreme Foot Users. Cell Reports , 28 (11) 2748-2748.e4. 10.1016/j.celrep.2019.08.027. Green open access

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Abstract

Although the fine-grained features of topographic maps in the somatosensory cortex can be shaped by everyday experience, it is unknown whether behavior can support the expression of somatotopic maps where they do not typically occur. Unlike the fingers, represented in all primates, individuated toe maps have only been found in non-human primates. Using 1-mm resolution fMRI, we identify organized toe maps in two individuals born without either upper limb who use their feet to substitute missing hand function and even support their profession as foot artists. We demonstrate that the ordering and structure of the artists’ toe representation mimics typical hand representation. We further reveal “hand-like” features of activity patterns, not only in the foot area but also similarly in the missing hand area. We suggest humans may have an innate capacity for forming additional topographic maps that can be expressed with appropriate experience.

Type: Article
Title: Organized Toe Maps in Extreme Foot Users
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.celrep.2019.08.027
Publisher version: https://doi.org/10.1016/j.celrep.2019.08.027
Language: English
Additional information: © 2019 The Author(s). Under a Creative Commons license (https://creativecommons.org/licenses/by/4.0/).
Keywords: adaptive, amputees, deprivation, ecological behavior, fMRI, hand, plasticity, reorganization, sensorimotor, somatotopy
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Institute of Cognitive Neuroscience
URI: https://discovery.ucl.ac.uk/id/eprint/10081247
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