Reachability and the sense of embodiment in amputees using prostheses
Abstract Amputated patients are hardly satisfied with upper limb prostheses, and tend to favour the use of their contralateral arm to partially compensate their disability. This may seem surprising in light of recent evidences that external objects (rubber hand or tool) can easily be embodied, namel...
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2017
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oai:doaj.org-article:0be0ab3e888444878eef1d94a6be13232021-12-02T12:32:14ZReachability and the sense of embodiment in amputees using prostheses10.1038/s41598-017-05094-62045-2322https://doaj.org/article/0be0ab3e888444878eef1d94a6be13232017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05094-6https://doaj.org/toc/2045-2322Abstract Amputated patients are hardly satisfied with upper limb prostheses, and tend to favour the use of their contralateral arm to partially compensate their disability. This may seem surprising in light of recent evidences that external objects (rubber hand or tool) can easily be embodied, namely incorporated in the body representation. We investigated both implicit body representations (by evaluating the peripersonal space using a reachability judgement task) and the quality of bodily integration of the patient’s prosthesis (assessed via questionnaires). As expected, the patients estimated that they could reach further while wearing their prosthesis, showing an embodiment of their prosthesis in their judgement. Yet, the real reaching space was found to be smaller with their prosthesis than with their healthy limb, showing a large error between reachability judgement and actual capacity. An overestimation was also found on the healthy side (comparatively to healthy subjects) suggesting a bilateral modification of body representation in amputated patients. Finally, a correlation was found between the quality of integration of the prosthesis and the way the body representation changed. This study therefore illustrates the multifaceted nature of the phenomenon of prosthesis integration, which involves its incorporation as a tool, but also various specific subjective aspects.Adrienne GouzienFréderique de VignemontAmélie TouilletNoël MartinetJozina De GraafNathanaël JarrasséAgnès Roby-BramiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017) |
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Medicine R Science Q Adrienne Gouzien Fréderique de Vignemont Amélie Touillet Noël Martinet Jozina De Graaf Nathanaël Jarrassé Agnès Roby-Brami Reachability and the sense of embodiment in amputees using prostheses |
| description |
Abstract Amputated patients are hardly satisfied with upper limb prostheses, and tend to favour the use of their contralateral arm to partially compensate their disability. This may seem surprising in light of recent evidences that external objects (rubber hand or tool) can easily be embodied, namely incorporated in the body representation. We investigated both implicit body representations (by evaluating the peripersonal space using a reachability judgement task) and the quality of bodily integration of the patient’s prosthesis (assessed via questionnaires). As expected, the patients estimated that they could reach further while wearing their prosthesis, showing an embodiment of their prosthesis in their judgement. Yet, the real reaching space was found to be smaller with their prosthesis than with their healthy limb, showing a large error between reachability judgement and actual capacity. An overestimation was also found on the healthy side (comparatively to healthy subjects) suggesting a bilateral modification of body representation in amputated patients. Finally, a correlation was found between the quality of integration of the prosthesis and the way the body representation changed. This study therefore illustrates the multifaceted nature of the phenomenon of prosthesis integration, which involves its incorporation as a tool, but also various specific subjective aspects. |
| format |
article |
| author |
Adrienne Gouzien Fréderique de Vignemont Amélie Touillet Noël Martinet Jozina De Graaf Nathanaël Jarrassé Agnès Roby-Brami |
| author_facet |
Adrienne Gouzien Fréderique de Vignemont Amélie Touillet Noël Martinet Jozina De Graaf Nathanaël Jarrassé Agnès Roby-Brami |
| author_sort |
Adrienne Gouzien |
| title |
Reachability and the sense of embodiment in amputees using prostheses |
| title_short |
Reachability and the sense of embodiment in amputees using prostheses |
| title_full |
Reachability and the sense of embodiment in amputees using prostheses |
| title_fullStr |
Reachability and the sense of embodiment in amputees using prostheses |
| title_full_unstemmed |
Reachability and the sense of embodiment in amputees using prostheses |
| title_sort |
reachability and the sense of embodiment in amputees using prostheses |
| publisher |
Nature Portfolio |
| publishDate |
2017 |
| url |
https://doaj.org/article/0be0ab3e888444878eef1d94a6be1323 |
| work_keys_str_mv |
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