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Author  |
Friedman, J.; Korman, M. | ||||
| Title | Observation of an expert model induces a skilled movement coordination pattern in a single session of intermittent practice | Type | Journal Article | ||
| Year | 2019 | Publication | Scientific Reports | Abbreviated Journal | Sci Rep |
| Volume | 9 | Issue | 1 | Pages | 4609 |
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| Abstract | We tested how observation of a skilled pattern of planar movements can assist in the learning of a new motor skill, which otherwise requires rigorous long-term practice to achieve fast and smooth performance. Sixty participants performed a sequence of planar hand movements on pre-test, acquisition, post-test and 24 h post-training blocks, under 1 of 4 conditions: an observation group (OG), a slowed observation group (SOG), a random motion control group (RMCG) and a double physical training control group (DPTCG). The OG and SOG observed an expert model's right hand performing the study task intermittently throughout acquisition, RMCG observed random dots movement instead of a model. Participants in the DPTCG received extra physical practice trials instead of the visually observed trials. Kinematic analysis revealed that only in conditions with observation of an expert model there was an instant robust improvement in motor planning of the task. This step-wise improvement was not only persistent in post-training retests but was also apparently implicit and subject to further incremental improvements in movement strategy over the period of 24 hours. The rapid change in motor strategy was accompanied by a transient within-session increase in spatial error for the observation groups, but this went away by 24 h post-training. We suggest that observation of hand movements of an expert model coaligned with self-produced movements during training can significantly condense the time-course of ecologically relevant drawing/writing skill mastery. | ||||
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| Language | English | Summary Language | Original Title | ||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 2045-2322 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:30872661 | Approved | no | ||
| Call Number | Serial | 94 | |||
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| Author |
Friedman, J.; Raveh, E.; Weiss, T.; Itkin, S.; Niv, D.; Hani, M.; Portnoy, S. | ||||
| Title | Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback | Type | |||
| Year | 2019 | Publication | Journal of Visualized Experiments : JoVE | Abbreviated Journal | J Vis Exp |
| Volume | 147 | Issue | Pages | e59493 | |
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| Abstract | The application of incongruent sensory signals that involves disrupted tactile feedback is rarely explored, specifically with the presence of vibrotactile feedback (VTF). This protocol aims to test the effect of VTF on the response to incongruent visual-tactile stimuli. The tactile feedback is acquired by grasping a block and moving it across a partition. The visual feedback is a real-time virtual presentation of the moving block, acquired using a motion capture system. The congruent feedback is the reliable presentation of the movement of the block, so that the subject feels that the block is grasped and see it move along with the path of the hand. The incongruent feedback appears as the movement of the block diverts from the actual movement path, so that it seems to drop from the hand when it is actually still held by the subject, thereby contradicting the tactile feedback. Twenty subjects (age 30.2 +/- 16.3) repeated 16 block transfers, while their hand was hidden. These were repeated with VTF and without VTF (total of 32 block transfers). Incongruent stimuli were presented randomly twice within the 16 repetitions in each condition (with and without VTF). Each subject was asked to rate the difficulty level of performing the task with and without the VTF. There were no statistically significant differences in the length of the hand paths and durations between transfers recorded with congruent and incongruent visual-tactile signals – with and without the VTF. The perceived difficulty level of performing the task with the VTF significantly correlated with the normalized path length of the block with VTF (r = 0.675, p = 0.002). This setup is used to quantify the additive or reductive value of VTF during motor function that involves incongruent visual-tactile stimuli. Possible applications are prosthetics design, smart sport-wear, or any other garments that incorporate VTF. | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 1940-087X | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:31180348 | Approved | no | ||
| Call Number | Serial | 101 | |||
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| Author |
Geller, N.; Moringen, A.; Friedman, J. | ||||
| Title | Learning juggling by gradually increasing difficulty vs. learning the complete skill results in different learning patterns | Type | Journal Article | ||
| Year | 2023 | Publication | Frontiers in Psychology | Abbreviated Journal | Front Psychol |
| Volume | 14 | Issue | Pages | 1284053 | |
| Keywords | coordination; difficulty; juggling; learning strategies; motor learning | ||||
| Abstract | Motor learning is central to sports, medicine, and other health professions as it entails learning through practice. To achieve proficiency in a complex motor task, many hours of practice are required. Therefore, finding ways to speed up the learning process is important. This study examines the impact of different training approaches on learning three-ball cascade juggling. Participants were assigned to one of two groups: practicing by gradually increasing difficulty and elements of the juggling movement (“learning in parts”) or training on the complete skill from the start (“all-at-once”). Results revealed that although the all-at-once group in the early stages of learning showed greater improvement in performance, the “learning in parts” group managed to catch up, even over a relatively short period of time. The lack of difference in performance between the groups at the end of the training session suggests that the choice of training regime (between all-at-once and learning in parts), at least in the short term, can be selected based on other factors such as the learner's preference, practical considerations, and cognitive style. | ||||
| Address | Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 1664-1078 | ISBN | Medium | ||
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| Notes | PMID:38022928; PMCID:PMC10679398 | Approved | no | ||
| Call Number | Serial | 120 | |||
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| Author |
Kaufman-Cohen, Y.; Friedman, J.; Levanon, Y.; Jacobi, G.; Doron, N.; Portnoy, S. | ||||
| Title | Wrist Plane of Motion and Range During Daily Activities | Type | Journal Article | ||
| Year | 2018 | Publication | American Journal of Occupational Therapy | Abbreviated Journal | Am J Occup Ther |
| Volume | 72 | Issue | 6 | Pages | 1-10 |
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| Abstract | OBJECTIVE. The dart-throwing motion (DTM) is a multiplane wrist motion that is needed for many daily occupations. Mobilization along the DTM plane may be essential for rehabilitation after wrist injury, but DTM angles are reported for the dominant hand alone, so their relevance to injury in the nondominant hand cannot be surmised. The aim of this study was to quantify the DTM plane angles for both hands during different activities of daily living (ADLs). METHOD. Forty-three healthy participants wore a twin-axis electrogoniometer during ADLs. RESULTS. No significant differences were found between the DTM plane angles of the dominant (20°�45°) and nondominant (15°�40°) hands. These angles varied by task and across participants. CONCLUSION. The DTM plane is a functional motion used by both hands during ADLs. Because the DTM plane angle differs among hands, tasks, and individual clients, wrist rehabilitation involving the DTM plane should not be limited to a singular DTM plane angle.OBJECTIVE. The dart-throwing motion (DTM) is a multiplane wrist motion that is needed for many daily occupations. Mobilization along the DTM plane may be essential for rehabilitation after wrist injury, but DTM angles are reported for the dominant hand alone, so their relevance to injury in the nondominant hand cannot be surmised. The aim of this study was to quantify the DTM plane angles for both hands during different activities of daily living (ADLs). METHOD. Forty-three healthy participants wore a twin-axis electrogoniometer during ADLs. RESULTS. No significant differences were found between the DTM plane angles of the dominant (20°�45°) and nondominant (15°�40°) hands. These angles varied by task and across participants. CONCLUSION. The DTM plane is a functional motion used by both hands during ADLs. Because the DTM plane angle differs among hands, tasks, and individual clients, wrist rehabilitation involving the DTM plane should not be limited to a singular DTM plane angle. |
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| ISSN | 0272-9490 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Serial | 92 | |||
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| Author |
Kaufman-Cohen, Y.; Levanon, Y.; Friedman, J.; Yaniv, Y.; Portnoy, S. | ||||
| Title | Home exercise in the dart-throwing motion plane after distal radius fractures: A Pilot Randomized Controlled Trial | Type | Journal Article | ||
| Year | 2020 | Publication | Journal of Hand Therapy | Abbreviated Journal | |
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| Notes | Approved | no | |||
| Call Number | Serial | 103 | |||
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