Article

The integration between posture and manual control while performing fitting tasks
of varying difficulty was investigated. Participants fit a block into either a
small (high precision) or large (low precision) opening while standing on a force
plate. Postural time-to-contact was used to quantify changes in posture that
occurred during the fitting movement. Results suggest that posture became more
stabilized when fitting through the small opening (postural time-to-contact
values were higher) compared to when fitting through the large opening.
Additionally, when fitting through the small opening, individuals modulated sway
based on the instantaneous demands of the task. Specifically, time-to-contact was
lower towards the end of a fitting movement (as the individual prepared to fit
the block through the opening) compared to the beginning of the movement. These
results suggest that the dynamics of postural sway are constantly changing based
on the constraints of a concurrent task.
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Langue : ANGLAIS