Proprioceptive body illusions modulate the visual perception of reaching distance
The neurobiology of reaching has been extensively studied in human and non-human primates. However, the mechanisms that allow a subject to decide-without engaging in explicit action-whether an object is reachable are not fully understood. Some studies conclude that decisions near the reach limit dep...
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paper:paper_19326203_v10_n6_p_Petroni2023-06-08T16:30:30Z Proprioceptive body illusions modulate the visual perception of reaching distance Petroni, Agustín Sigman, Mariano adult Article controlled study distance perception female finger hand movement human human experiment light emitting diode male normal human prediction proprioception response time stimulus response visual illusion young adult body image decision making illusion movement (physiology) physiology proprioception psychomotor performance vision Primates Adult Body Image Female Humans Illusions Judgment Male Movement Proprioception Psychomotor Performance Visual Perception Young Adult The neurobiology of reaching has been extensively studied in human and non-human primates. However, the mechanisms that allow a subject to decide-without engaging in explicit action-whether an object is reachable are not fully understood. Some studies conclude that decisions near the reach limit depend on motor simulations of the reaching movement. Others have shown that the body schema plays a role in explicit and implicit distance estimation, especially after motor practice with a tool. In this study we evaluate the causal role of multisensory body representations in the perception of reachable space. We reasoned that if body schema is used to estimate reach, an illusion of the finger size induced by proprioceptive stimulation should propagate to the perception of reaching distances. To test this hypothesis we induced a proprioceptive illusion of extension or shrinkage of the right index finger while participants judged a series of LEDs as reachable or non-reachable without actual movement. Our results show that reach distance estimation depends on the illusory perceived size of the finger: illusory elongation produced a shift of reaching distance away from the body whereas illusory shrinkage produced the opposite effect. Combining these results with previous findings, we suggest that deciding if a target is reachable requires an integration of body inputs in high order multisensory parietal areas that engage in movement simulations through connections with frontal premotor areas. Copyright: © 2015 Petroni et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Fil:Petroni, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Sigman, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19326203_v10_n6_p_Petroni http://hdl.handle.net/20.500.12110/paper_19326203_v10_n6_p_Petroni |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
adult Article controlled study distance perception female finger hand movement human human experiment light emitting diode male normal human prediction proprioception response time stimulus response visual illusion young adult body image decision making illusion movement (physiology) physiology proprioception psychomotor performance vision Primates Adult Body Image Female Humans Illusions Judgment Male Movement Proprioception Psychomotor Performance Visual Perception Young Adult |
| spellingShingle |
adult Article controlled study distance perception female finger hand movement human human experiment light emitting diode male normal human prediction proprioception response time stimulus response visual illusion young adult body image decision making illusion movement (physiology) physiology proprioception psychomotor performance vision Primates Adult Body Image Female Humans Illusions Judgment Male Movement Proprioception Psychomotor Performance Visual Perception Young Adult Petroni, Agustín Sigman, Mariano Proprioceptive body illusions modulate the visual perception of reaching distance |
| topic_facet |
adult Article controlled study distance perception female finger hand movement human human experiment light emitting diode male normal human prediction proprioception response time stimulus response visual illusion young adult body image decision making illusion movement (physiology) physiology proprioception psychomotor performance vision Primates Adult Body Image Female Humans Illusions Judgment Male Movement Proprioception Psychomotor Performance Visual Perception Young Adult |
| description |
The neurobiology of reaching has been extensively studied in human and non-human primates. However, the mechanisms that allow a subject to decide-without engaging in explicit action-whether an object is reachable are not fully understood. Some studies conclude that decisions near the reach limit depend on motor simulations of the reaching movement. Others have shown that the body schema plays a role in explicit and implicit distance estimation, especially after motor practice with a tool. In this study we evaluate the causal role of multisensory body representations in the perception of reachable space. We reasoned that if body schema is used to estimate reach, an illusion of the finger size induced by proprioceptive stimulation should propagate to the perception of reaching distances. To test this hypothesis we induced a proprioceptive illusion of extension or shrinkage of the right index finger while participants judged a series of LEDs as reachable or non-reachable without actual movement. Our results show that reach distance estimation depends on the illusory perceived size of the finger: illusory elongation produced a shift of reaching distance away from the body whereas illusory shrinkage produced the opposite effect. Combining these results with previous findings, we suggest that deciding if a target is reachable requires an integration of body inputs in high order multisensory parietal areas that engage in movement simulations through connections with frontal premotor areas. Copyright: © 2015 Petroni et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
| author |
Petroni, Agustín Sigman, Mariano |
| author_facet |
Petroni, Agustín Sigman, Mariano |
| author_sort |
Petroni, Agustín |
| title |
Proprioceptive body illusions modulate the visual perception of reaching distance |
| title_short |
Proprioceptive body illusions modulate the visual perception of reaching distance |
| title_full |
Proprioceptive body illusions modulate the visual perception of reaching distance |
| title_fullStr |
Proprioceptive body illusions modulate the visual perception of reaching distance |
| title_full_unstemmed |
Proprioceptive body illusions modulate the visual perception of reaching distance |
| title_sort |
proprioceptive body illusions modulate the visual perception of reaching distance |
| publishDate |
2015 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19326203_v10_n6_p_Petroni http://hdl.handle.net/20.500.12110/paper_19326203_v10_n6_p_Petroni |
| work_keys_str_mv |
AT petroniagustin proprioceptivebodyillusionsmodulatethevisualperceptionofreachingdistance AT sigmanmariano proprioceptivebodyillusionsmodulatethevisualperceptionofreachingdistance |
| _version_ |
1768541580689408000 |