| Autor: |
M.M. Thompson, W.G. Tatton, M.C. Vorrisr |
| Rok vydání: |
2005 |
| Předmět: |
|
| Zdroj: |
[1990] Proceedings of the Twelfth Annual International Conference of the IEEE Engineering in Medicine and Biology Society. |
| DOI: |
10.1109/iembs.1990.692085 |
| Popis: |
The multljointklnematlcs of dkectreachlng to a target and indirectreaching movements around obstacles to a target wre studled in ml and Parkinsonian humans.The reaching task was desQned so that the coordinates dthe target and the obstacles we acquired simultaneously with the cue to move. Indirect movements required an average of40 msec longer km cue to movement Initiation than direct movements which may represent the increased processing necessary to plan a trajectay appropriate to avoid the obstacles. Although saccadic eye movements from a cenlral fixation point to the target alwys occurred concurrently with thereachingmovement,visual~veationofthetargetorthe obstacles was notrequired forthe the reaching movements. The movements had single velocity maxima which decreased by 11% on average for indirect reaching relative to direct reaching. "als performed highly reproducible trajectories for a given targebbsbcle confiuatin and were able to execute variable hpctories for dflerent configurations. Parklnsonians demonslrated a comparatively limited subset of trajectories In a manner suggesting an inabllky to abequakly integrate visuospatial and kinemati sensory information. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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