Differences in motor variability among individuals performing a standardized short-cycle manual task
� 2016 Elsevier B.V. Motor variability (MV) has been suggested to be a determinant of the risk for developing musculoskeletal disorders in repetitive work. In this study we examined whether individuals consistently differed in the extent of motor variability when performing a standardized short-cy...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Elsevier BV; North Holland
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/69028 |
| _version_ | 1848761949034119168 |
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| author | Sandlund, J. Srinivasan, D. Heiden, M. Mathiassen, Svend |
| author_facet | Sandlund, J. Srinivasan, D. Heiden, M. Mathiassen, Svend |
| author_sort | Sandlund, J. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | � 2016 Elsevier B.V. Motor variability (MV) has been suggested to be a determinant of the risk for developing musculoskeletal disorders in repetitive work. In this study we examined whether individuals consistently differed in the extent of motor variability when performing a standardized short-cycle manual task. On three separate days, arm kinematics was recorded in 14 healthy subjects performing a pipetting task, transferring liquid from a pick-up tube to eight target tubes with a cycle time of 2.8�s. Cycle-to-cycle standard deviations (SD) of a large selection of shoulder and elbow kinematic variables, were processed using principal component analysis (PCA). Thereafter, between-subjects and between-days (within-subject) variance components were calculated using a random effects model for each of four extracted principal components. The results showed that MV differed consistently between subjects (95% confidence intervals of the between-subjects variances did not include zero) and that subjects differed consistently in MV between days. Thus, our results support the notion that MV may be a consistent personal trait, even though further research is needed to verify whether individuals rank consistently in MV even across tasks. If so, MV may be a candidate determinant of the risk of developing fatigue and musculoskeletal disorders in repetitive occupational work. |
| first_indexed | 2025-11-14T10:39:47Z |
| format | Journal Article |
| id | curtin-20.500.11937-69028 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:39:47Z |
| publishDate | 2017 |
| publisher | Elsevier BV; North Holland |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-690282018-06-29T12:36:11Z Differences in motor variability among individuals performing a standardized short-cycle manual task Sandlund, J. Srinivasan, D. Heiden, M. Mathiassen, Svend � 2016 Elsevier B.V. Motor variability (MV) has been suggested to be a determinant of the risk for developing musculoskeletal disorders in repetitive work. In this study we examined whether individuals consistently differed in the extent of motor variability when performing a standardized short-cycle manual task. On three separate days, arm kinematics was recorded in 14 healthy subjects performing a pipetting task, transferring liquid from a pick-up tube to eight target tubes with a cycle time of 2.8�s. Cycle-to-cycle standard deviations (SD) of a large selection of shoulder and elbow kinematic variables, were processed using principal component analysis (PCA). Thereafter, between-subjects and between-days (within-subject) variance components were calculated using a random effects model for each of four extracted principal components. The results showed that MV differed consistently between subjects (95% confidence intervals of the between-subjects variances did not include zero) and that subjects differed consistently in MV between days. Thus, our results support the notion that MV may be a consistent personal trait, even though further research is needed to verify whether individuals rank consistently in MV even across tasks. If so, MV may be a candidate determinant of the risk of developing fatigue and musculoskeletal disorders in repetitive occupational work. 2017 Journal Article http://hdl.handle.net/20.500.11937/69028 10.1016/j.humov.2016.10.009 Elsevier BV; North Holland restricted |
| spellingShingle | Sandlund, J. Srinivasan, D. Heiden, M. Mathiassen, Svend Differences in motor variability among individuals performing a standardized short-cycle manual task |
| title | Differences in motor variability among individuals performing a standardized short-cycle manual task |
| title_full | Differences in motor variability among individuals performing a standardized short-cycle manual task |
| title_fullStr | Differences in motor variability among individuals performing a standardized short-cycle manual task |
| title_full_unstemmed | Differences in motor variability among individuals performing a standardized short-cycle manual task |
| title_short | Differences in motor variability among individuals performing a standardized short-cycle manual task |
| title_sort | differences in motor variability among individuals performing a standardized short-cycle manual task |
| url | http://hdl.handle.net/20.500.11937/69028 |