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Full-Text Articles in Biomedical Engineering and Bioengineering

Sensorimotor Adaptation In Whole-Body Postural Control, Alison Pienciak-Siewert Jan 2016

Sensorimotor Adaptation In Whole-Body Postural Control, Alison Pienciak-Siewert

Mechanical Engineering Graduate Theses & Dissertations

The ability to maintain stable, upright standing is a critical component of our daily activities. This ability requires that we generate appropriate postural control when making voluntary movements and when responding to perturbations, and appropriately adapt that control to compensate for changing conditions. Despite this, adaptation of whole-body postural control is not well understood.

This dissertation investigates the control strategies involved in the adaptation of whole-body postural control and how well this learning transfers to different environments. We used an experimental paradigm in which subjects made reaching movements while standing and holding the handle of a force-generating robotic arm that ...


On The Generalization Of Decision-Making Preferences In Movement Under Risk, Megan Kathleen O'Brien Jan 2014

On The Generalization Of Decision-Making Preferences In Movement Under Risk, Megan Kathleen O'Brien

Mechanical Engineering Graduate Theses & Dissertations

Nearly every aspect of our behavior is framed by risk, and people can respond to risk very differently. Some individuals readily confront highly variable situations in order to obtain large rewards (risk-seeking behavior), while others prefer more certain situations even if it means obtaining smaller rewards (risk-averse behavior).

At present, the role that risk plays in movement decisions is poorly understood. This dissertation investigates human movement decisions under risk, exploring the rationality of movement behavior in risky constructs and whether sensitivity to risk generalizes across movements. In the first study, I compared risk-sensitivity between two continuous motor tasks (arm-reaching and ...