Sensorimotor adaptation in response to proprioceptive bias

Bernier, Pierre-Michel, Chua, Romeo, Inglis, J. Timothy and Franks, Ian M. (2007) Sensorimotor adaptation in response to proprioceptive bias. Experimental Brain Research, 177 2: 147-156. doi:10.1007/s00221-006-0658-5


Author Bernier, Pierre-Michel
Chua, Romeo
Inglis, J. Timothy
Franks, Ian M.
Title Sensorimotor adaptation in response to proprioceptive bias
Journal name Experimental Brain Research   Check publisher's open access policy
ISSN 0014-4819
1432-1106
Publication date 2007
Sub-type Article (original research)
DOI 10.1007/s00221-006-0658-5
Volume 177
Issue 2
Start page 147
End page 156
Total pages 10
Place of publication Berlin, Germany
Publisher Springer
Language eng
Subject 1109 Neurosciences
Abstract Studies investigating visuo-motor adaptation typically introduce sensory conflicts by manipulating visual information (prisms, cursor gains). The purpose of the present study was to determine whether similar adaptation would be observed when a conflict is created through distortion of the proprioceptive sense, rather than through visual distortion. We used a coordinated movement task that required participants to release thumb and index finger at a specific elbow angle during passive elbow extension. Participants could not see their arm, but were shown a cursor representing the forearm on a video screen. In the proprioceptive group, a sensory conflict was introduced by vibrating the biceps brachii muscle, introducing a discrepancy of approximately 7.5° between the proprioceptively perceived and visually perceived elbow angle. In the visual group, a conflict of similar magnitude was obtained by introducing a gain of 7.5° to the cursor with respect to forearm position. Adaptation was assessed by the presence of plastic changes in release elbow angles following a period of exposure to the sensory conflict (i.e., aftereffects). Both groups showed high accuracy during exposure despite the sensory conflicts. More importantly, the visual group presented large and persistent aftereffects, while the proprioceptive group presented none. We suggest that the proprioceptive group’s lack of adaptation was due to the artificial muscle spindle activity resulting from vibration, which prevented visual and proprioceptive signals to be merged into a common frame of reference
Keyword Visuomotor adaptation
Vision
Proprioception
Vibration
Muscle spindle
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Published online: 7 September 2006

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Health and Rehabilitation Sciences Publications
 
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Created: Wed, 04 Mar 2009, 16:11:19 EST by Alexandra Cooney on behalf of School of Health & Rehabilitation Sciences