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- W1978340528 abstract "To study the interaction between feedforward and feedback modes of postural control, we investigated postural responses during unexpected perturbations of the support surface that occurred during forward reaching in a standing position. We examined postural responses in lower limb muscles of nine human subjects. Baseline measures were obtained when subjects executed reaching movements to a target placed in front of them (R condition) and during postural responses to forward and backward support-surface perturbations (no reaching, P condition) during quiet stance. Perturbations were also given at different delays after the onset of reaching movements (RP conditions) as well as with the arm extended in the direction of the target, but not reaching (P/AE condition). Results showed that during perturbations to reaching (RP), the initial automatic postural response, occurring around 100 ms after the onset of perturbations, was relatively unchanged in latency or amplitude compared to control conditions (P and P/AE). However, longer latency postural responses were modulated to aid in the reaching movements during forward perturbations but not during backward perturbations. Our results suggest that the nervous system prioritizes the maintenance of a stable postural base during reaching, and that later components of the postural responses can be modulated to ensure the performance of the voluntary task." @default.
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- W1978340528 date "2009-12-25" @default.
- W1978340528 modified "2023-09-23" @default.
- W1978340528 title "Postural responses to unexpected perturbations of balance during reaching" @default.
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- W1978340528 doi "https://doi.org/10.1007/s00221-009-2135-4" @default.
- W1978340528 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4059204" @default.
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