Generalization indicates asymmetric and interactive control networks for multi-finger dexterous movements
Summary: Finger dexterity is manifested by coordinated patterns of muscle activity and generalization of learning across contexts. Some fingers flex, others extend, and some are immobile. Whether or not the neural control processes of these direction-specific actions are independent remains unclear....
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Cell Reports |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211124723002255 |
| _version_ | 1797869729613873152 |
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| author | Gili Kamara Ohad Rajchert Deborah Solomonow-Avnon Firas Mawase |
| author_facet | Gili Kamara Ohad Rajchert Deborah Solomonow-Avnon Firas Mawase |
| author_sort | Gili Kamara |
| collection | DOAJ |
| description | Summary: Finger dexterity is manifested by coordinated patterns of muscle activity and generalization of learning across contexts. Some fingers flex, others extend, and some are immobile. Whether or not the neural control processes of these direction-specific actions are independent remains unclear. We characterized behavioral principles underlying learning and generalization of dexterous flexion and extension movements, within and across hands, using an isometric dexterity task that precisely measured finger individuation, force accuracy, and temporal synchronization. Two cohorts of participants trained for 3 days in either the flexion or extension direction. All dexterity measures in both groups showed post-training improvement, although finger extension exhibited inferior dexterity. Surprisingly, learning of finger extension generalized to the untrained flexion direction, but not vice versa. This flexion bias was also evident in the untrained hand. Our study indicates direction-specific control circuits for learning of finger flexion and extension that interact by partially, but asymmetrically, transferring between directions. |
| first_indexed | 2024-04-10T00:17:32Z |
| format | Article |
| id | doaj.art-043d1c5619e6470e8ef8eece3bc4747a |
| institution | Directory Open Access Journal |
| issn | 2211-1247 |
| language | English |
| last_indexed | 2024-04-10T00:17:32Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Cell Reports |
| spelling | doaj.art-043d1c5619e6470e8ef8eece3bc4747a2023-03-16T05:03:46ZengElsevierCell Reports2211-12472023-03-01423112214Generalization indicates asymmetric and interactive control networks for multi-finger dexterous movementsGili Kamara0Ohad Rajchert1Deborah Solomonow-Avnon2Firas Mawase3Faculty of Biomedical Engineering, Technion – Israel Institute of Technology, Haifa, IsraelFaculty of Biomedical Engineering, Technion – Israel Institute of Technology, Haifa, IsraelFaculty of Biomedical Engineering, Technion – Israel Institute of Technology, Haifa, IsraelFaculty of Biomedical Engineering, Technion – Israel Institute of Technology, Haifa, Israel; Corresponding authorSummary: Finger dexterity is manifested by coordinated patterns of muscle activity and generalization of learning across contexts. Some fingers flex, others extend, and some are immobile. Whether or not the neural control processes of these direction-specific actions are independent remains unclear. We characterized behavioral principles underlying learning and generalization of dexterous flexion and extension movements, within and across hands, using an isometric dexterity task that precisely measured finger individuation, force accuracy, and temporal synchronization. Two cohorts of participants trained for 3 days in either the flexion or extension direction. All dexterity measures in both groups showed post-training improvement, although finger extension exhibited inferior dexterity. Surprisingly, learning of finger extension generalized to the untrained flexion direction, but not vice versa. This flexion bias was also evident in the untrained hand. Our study indicates direction-specific control circuits for learning of finger flexion and extension that interact by partially, but asymmetrically, transferring between directions.http://www.sciencedirect.com/science/article/pii/S2211124723002255CP: Neuroscience |
| spellingShingle | Gili Kamara Ohad Rajchert Deborah Solomonow-Avnon Firas Mawase Generalization indicates asymmetric and interactive control networks for multi-finger dexterous movements Cell Reports CP: Neuroscience |
| title | Generalization indicates asymmetric and interactive control networks for multi-finger dexterous movements |
| title_full | Generalization indicates asymmetric and interactive control networks for multi-finger dexterous movements |
| title_fullStr | Generalization indicates asymmetric and interactive control networks for multi-finger dexterous movements |
| title_full_unstemmed | Generalization indicates asymmetric and interactive control networks for multi-finger dexterous movements |
| title_short | Generalization indicates asymmetric and interactive control networks for multi-finger dexterous movements |
| title_sort | generalization indicates asymmetric and interactive control networks for multi finger dexterous movements |
| topic | CP: Neuroscience |
| url | http://www.sciencedirect.com/science/article/pii/S2211124723002255 |
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