On the Mechanics of Immediate Corrections and Aftereffects in Prism Adaptation
Prisms laterally shifting the perceived visual world cause arm movements to deviate from intended targets. The resulting error—the direct effect—both for pointing and throwing movements, usually corresponds to only around half of the prism’s optical power due to an “immediate correction effect”. We...
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-12-01
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| Series: | Vision |
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| Online Access: | https://www.mdpi.com/2411-5150/1/4/27 |
| _version_ | 1818031007417237504 |
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| author | Klaudia Pochopien Karoline Spang Torsten Stemmler Manfred Fahle |
| author_facet | Klaudia Pochopien Karoline Spang Torsten Stemmler Manfred Fahle |
| author_sort | Klaudia Pochopien |
| collection | DOAJ |
| description | Prisms laterally shifting the perceived visual world cause arm movements to deviate from intended targets. The resulting error—the direct effect—both for pointing and throwing movements, usually corresponds to only around half of the prism’s optical power due to an “immediate correction effect”. We investigated the mechanisms of this immediate correction effect. In three experiments with 73 healthy subjects we find that the immediate correction effect is associated with a head and/or eye rotation. Since these rotations are subconscious they are not taken into account by the participants. These subconscious rotations compensate for a large portion of the prism’s optical effect and change the subjective straight ahead. These movements seem to be induced only in a rich visual environment and hence do not take place in the dark. They correspond to the difference between the direct effect and the optical power of the prisms and seem to cause the immediate correction effect. Hence, eye-hand adaptation only adapts to the prism’s optical power minus unconscious head rotation and hence is much smaller than the optical power of the prisms. |
| first_indexed | 2024-12-10T05:44:38Z |
| format | Article |
| id | doaj.art-94f85b05c776479eb256814788ec8de6 |
| institution | Directory Open Access Journal |
| issn | 2411-5150 |
| language | English |
| last_indexed | 2024-12-10T05:44:38Z |
| publishDate | 2017-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Vision |
| spelling | doaj.art-94f85b05c776479eb256814788ec8de62022-12-22T02:00:11ZengMDPI AGVision2411-51502017-12-01142710.3390/vision1040027vision1040027On the Mechanics of Immediate Corrections and Aftereffects in Prism AdaptationKlaudia Pochopien0Karoline Spang1Torsten Stemmler2Manfred Fahle3Department of Human-Neurobiology, University of Bremen, Hochschulring 18, D-28359 Bremen, GermanyDepartment of Human-Neurobiology, University of Bremen, Hochschulring 18, D-28359 Bremen, GermanyGierather Straße 195 A, D-51469 Bergisch Gladbach, GermanyDepartment of Human-Neurobiology, University of Bremen, Hochschulring 18, D-28359 Bremen, GermanyPrisms laterally shifting the perceived visual world cause arm movements to deviate from intended targets. The resulting error—the direct effect—both for pointing and throwing movements, usually corresponds to only around half of the prism’s optical power due to an “immediate correction effect”. We investigated the mechanisms of this immediate correction effect. In three experiments with 73 healthy subjects we find that the immediate correction effect is associated with a head and/or eye rotation. Since these rotations are subconscious they are not taken into account by the participants. These subconscious rotations compensate for a large portion of the prism’s optical effect and change the subjective straight ahead. These movements seem to be induced only in a rich visual environment and hence do not take place in the dark. They correspond to the difference between the direct effect and the optical power of the prisms and seem to cause the immediate correction effect. Hence, eye-hand adaptation only adapts to the prism’s optical power minus unconscious head rotation and hence is much smaller than the optical power of the prisms.https://www.mdpi.com/2411-5150/1/4/27prism adaptationimmediate correction effectdirect effectperceptual learningpsychophysics |
| spellingShingle | Klaudia Pochopien Karoline Spang Torsten Stemmler Manfred Fahle On the Mechanics of Immediate Corrections and Aftereffects in Prism Adaptation Vision prism adaptation immediate correction effect direct effect perceptual learning psychophysics |
| title | On the Mechanics of Immediate Corrections and Aftereffects in Prism Adaptation |
| title_full | On the Mechanics of Immediate Corrections and Aftereffects in Prism Adaptation |
| title_fullStr | On the Mechanics of Immediate Corrections and Aftereffects in Prism Adaptation |
| title_full_unstemmed | On the Mechanics of Immediate Corrections and Aftereffects in Prism Adaptation |
| title_short | On the Mechanics of Immediate Corrections and Aftereffects in Prism Adaptation |
| title_sort | on the mechanics of immediate corrections and aftereffects in prism adaptation |
| topic | prism adaptation immediate correction effect direct effect perceptual learning psychophysics |
| url | https://www.mdpi.com/2411-5150/1/4/27 |
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