We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Brevity of haptic force perturbations induces heightened adaptive sensitivity.
- Authors
Wanda, Paul; Fine, Michael; Weeks, Heidi; Gross, Andrew; Macy, Jenny; Thoroughman, Kurt
- Abstract
We have exposed human participants to both full-movement and pulsatile viscous force perturbations to study the effect of force duration on the incremental transformation of sensation into adaptation. Traditional views of movement biomechanics could suggest that pulsatile forces would largely be attenuated as stiffness and viscosity act as a natural low-pass filter. Sensory transduction, however, tends to react to changes in stimuli and therefore could underlie heightened sensitivity to briefer, pulsatile forces. Here, participants adapted within perturbation duration conditions in a manner proportionate to sensed force and positional errors. Across perturbation conditions, we found participants had greater adaptive sensitivity when experiencing pulsatile forces rather than full-movement forces. In a follow-up experiment, we employed error-clamped, force channel trials to determine changes in predictive force generation. We found that while participants learned to closely compensate for the amplitude and breadth of full-movement forces, they exhibited a persistent mismatch in amplitude and breadth between adapted motor output and experienced pulsatile forces. This mismatch could generate higher salience of error signals that contribute to heightened sensitivity to pulsatile forces.
- Subjects
TOUCH; PERTURBATION theory; SENSITIVITY (Personality trait); HUMAN mechanics; PHYSIOLOGICAL adaptation; SENSORY evaluation
- Publication
Experimental Brain Research, 2013, Vol 226, Issue 3, p407
- ISSN
0014-4819
- Publication type
Academic Journal
- DOI
10.1007/s00221-013-3450-3