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Liebermann, D.G.; Raz, T.; Dickinson, J. |
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On Intentional and Incidental Learning and Estimation of Temporal and Spatial Information |
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1988 |
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Journal of Human Movement Studies |
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15 |
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191-204 |
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54 |
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Liebermann, D.G.; Issurin V. |
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Effects of vibratory stimulation on the perception of effort during isotonic contractions |
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1997 |
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Journal of Human Movement Studies |
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32 |
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171-186 |
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61 |
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Uri, O.; Pritsch, M.; Oran, A.; Liebermann, D.G. |
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Title |
Upper limb kinematics after arthroscopic and open shoulder stabilization |
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2014 |
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Journal of Shoulder and Elbow Surgery |
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Journal of Shoulder and Elbow Surgery |
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1058-2746 |
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75 |
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Frenkel-Toledo, S.; Levin, M.F.; Berman, S.; Liebermann, D.G.; Baniña, M.C.; Solomon, J.M.; Ofir-Geva, S.; Soroker, N. |
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Title |
Shared and distinct voxel-based lesion-symptom mappings for spasticity and impaired movement in the hemiparetic upper limb |
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Journal Article |
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2022 |
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Scientific Reports |
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Sci Rep |
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12 |
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1 |
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2045-2322 |
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113 |
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Liebermann, D.G.; Levin, M.F.; McIntyre, J.; Weiss, P.L.; Berman, S. |
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Title |
Arm path fragmentation and spatiotemporal features of hand reaching in healthy subjects and stroke patients |
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Journal Article |
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2010 |
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Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference |
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Conf Proc IEEE Eng Med Biol Soc |
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2010 |
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5242-5245 |
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Aged; Aged, 80 and over; Analysis of Variance; Arm/*physiology; Biomechanics/physiology; Female; Hand/*physiology; *Health; Humans; Male; Middle Aged; Movement/*physiology; Posture/physiology; Principal Component Analysis; Stroke/*physiopathology; Time Factors |
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Abstract |
Arm motion in healthy humans is characterized by smooth and relatively short paths. The current study focused on 3D reaching in stroke patients. Sixteen right-hemiparetic stroke patients and 8 healthy adults performed 42 reaching movements towards 3 visual targets located at an extended arm distance. Performance was assessed in terms of spatial and temporal features of the movement; i.e., hand path, arm posture and smoothness. Differences between groups and within subjects were hypothesized for spatial and temporal aspects of reaching under the assumption that both are independent. As expected, upper limb motion of patients was characterized by longer and jerkier hand paths and slower speeds. Assessment of the number of sub-movements within each movement did not clearly discriminate between groups. Principal component analyses revealed specific clusters of either spatial or temporal measures, which accounted for a large proportion of the variance in patients but not in healthy controls. These findings support the notion of a separation between spatial and temporal features of movement. Stroke patients may fail to integrate the two aspects when executing reaching movements towards visual targets. |
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Physical Therapy Dept., Sackler Faculty of Medicine, Tel Aviv University, 69978 Israel. dlieberm@post.tau.ac.il |
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English |
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1557-170X |
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PMID:21096047 |
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30 |
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