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- W2045644445 abstract "Kinematic descriptors were obtained for effects of object distance and size on performance of prehension by six ataxic patients following traumatic brain injury (TBI) and six matched controls. The Constant Enclosure model of prehension (Hoff & Arbib, 1991) predicted the movements of both groups, and ataxic movement patterns suggested that the subjects were utilising compensatory strategies to reduce effects of uncontrolled interactive joint torques (Thach et al., 1993; Bastian et al., 1996). Changes in task constraints were shown to modify ataxic movements: prolonged durations of transport and grasp phases were reduced in reaches to small, close objects, and the positive skew of velocity profiles was less when the object was close. Discontinuities (Jagacinski et al., 1980) were identified in the wrist trajectories of the ataxic group. The number and duration of these Movement Units (MU) were unaffected by distance or size of the object, but the displacement within MUs was less in reaches to close objects.PsycINFO classification: 2330; 3297; 3380" @default.
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- W2045644445 date "1999-06-01" @default.
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- W2045644445 title "Kinematic analysis of effects of task constraints on prehension in ataxic brain-injured subjects" @default.
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- W2045644445 doi "https://doi.org/10.1016/s0167-9457(99)00010-x" @default.
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