Direct-effects and after-effects of visuomotor adaptation with one arm on subsequent performance with the other arm. J Neurophysiol 2015 Jul;114(1):468-73
Date
05/29/2015Pubmed ID
26019313Pubmed Central ID
PMC4509398DOI
10.1152/jn.00298.2015Scopus ID
2-s2.0-84937437832 (requires institutional sign-in at Scopus site) 18 CitationsAbstract
Adapting to a novel sensorimotor condition is generally thought to result in the formation of an internal representation associated with the novel sensorimotor transform. While the presence of after-effects following sensorimotor adaptation is taken as evidence that such an internal representation was developed as a result of adaptation, it remains unclear whether the absence of after-effects following sensorimotor adaptation indicates that no internal representation was developed. In the present study, we examined this question by having individuals adapt to a 30° visual rotation with one arm first and testing 1) how the initial adaptation would influence subsequent performance with the other arm under the same visual condition (called direct-effects) or under a normal visual condition (called after-effects); or 2) how the initial adaptation that occurred at one workspace location would influence subsequent performance at another location with the same arm under the same or a normal visual condition. Results indicated that initial adaptation with one arm significantly influenced subsequent performance with the other in terms of direct- but not after-effects and that initial adaptation at one workspace location significantly influenced subsequent performance at a new location with the same arm in terms of both direct- and after-effects, but to different extents. These findings indicate that formation of a neural representation associated with a novel visuomotor transform does not always result in after-effects and suggest that visuomotor adaptation may involve multiple aspects of a neural representation, some of which are effector independent and some of which are effector dependent.
Author List
Wang J, Lei YAuthor
Jinsung Wang PhD Assistant Professor in the Human Movement Sciences department at University of Wisconsin - MilwaukeeMESH terms used to index this publication - Major topics in bold
Adaptation, PhysiologicalAdaptation, Psychological
Adolescent
Adult
Arm
Female
Humans
Male
Psychomotor Performance
Psychophysics
Robotics
Rotation
Visual Perception
Young Adult
