QUT ePrints

Concurrent adaptation of left and right arm to opposite visual distortions

Bock, Otmar, Worringham, Charles J., & Thomas, Monika (2005) Concurrent adaptation of left and right arm to opposite visual distortions. Experimental Brain Research, 162(4), pp. 513-519.

View at publisher

Abstract

Previous research has shown that subjects can adapt with either arm to an opposite visual distortion, and the two adaptive states can then be used in sequence to control the respective arm. To extend this finding, we exposed the left and right arm of our subjects alternately for 20 s each to opposite-directed rotations of the visual field, and determined the time-course of adaptation, as well as the aftereffects without visual feedback under uni- and bimanual conditions. Our data confirm that two adaptive states can co-exist in the sensorimotor system, one for each arm. We further found that the time-course of adaptive improvement was similar for both arms, that the improvement was present as early as the first movement after a change of arm and discordance, and that the magnitude of adaptation was similar to control data yielded by a single arm and discordance. Taken together, these findings suggest that the two adaptive states were formed concurrently, and without mutual interference. We also observed significant aftereffects. They were smaller but still appreciable under bimanual conditions, i.e., the two arms moved at the same time in different directions even though they were aimed at a common visual target. This outcome indicates that the two adaptive states were not merely of a strategic nature, but rather changed the rules by which sensory information was transformed into motor outputs; it also suggests that the two states not only co-exist, but also can concurrently be engaged in movement control. The reduction of the aftereffect under bimanual conditions was attributed to the well-known phenomenon of bimanual coupling, which is unrelated to adaptation.

Impact and interest:

19 citations in Scopus
Search Google Scholar™
18 citations in Web of Science®

Citation countsare sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

Full-text downloads:

377 since deposited on 14 Mar 2005
75 in the past twelve months

Full-text downloadsdisplays the total number of times this work’s files (e.g., a PDF) have been downloaded from QUT ePrints as well as the number of downloads in the previous 365 days. The count includes downloads for all files if a work has more than one.

ID Code: 687
Item Type: Journal Article
Keywords: psychomotor performance, human information processing, physiological adaptation, transfer, inhibition
DOI: 10.1007/s00221-005-2222-0
ISSN: 1432-1106
Subjects: Australian and New Zealand Standard Research Classification > PSYCHOLOGY AND COGNITIVE SCIENCES (170000) > PSYCHOLOGY (170100) > Sensory Processes Perception and Performance (170112)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > HUMAN MOVEMENT AND SPORTS SCIENCE (110600) > Motor Control (110603)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > NEUROSCIENCES (110900) > Sensory Systems (110906)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2005 Springer
Copyright Statement: The original publication is available at SpringerLink http://www.springerlink.com
Deposited On: 14 Mar 2005
Last Modified: 29 Feb 2012 23:16

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page