Sensorimotor integration: Prehensile movements in conditions of visuo-proprioceptive conflict.
Published: 2006
Language: eng
Number of pages: 110
ISBN-13: 9780494213117
Description: Aim. To understand the integration of visual and proprioceptive information presented during planning of prehensile movements. Vision was expected to receive the highest sensory-weight; however, proprioception was expected to contribute to prevent prehension errors.Methods. In study 1, target size was the same as either the visual or proprioceptive cue (incongruent) or both (congruent). In study 2, congruency likelihood was manipulated (20%- or 80%-congruent trials).Conclusions. Although vision was weighted highest in most instances, large proprioceptive cues reduced this 'visual dominance' in conditions of sensory conflict. Large-size sensory cues caused the greatest change in kinematic grasp characteristics. Both modalities contribute to the planning of prehension using a principle based on avoiding prehension error.Results. In study 1, large incongruent proprioceptive cues affected behaviour (i.e., caused increased maximum grasp aperture). High congruency likelihood (80%-congruent) decreased aperture velocity and increased MGA. Effects on fingertip forces were not consistent in either study.
Notes: Source: Masters Abstracts International, Volume: 45-03, page: 1393.

Thesis (M.Sc.)--University of Toronto, 2006.

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