Impaired visual hand recognition in preoperative patients during brachial plexus anesthesia: importance of peripheral neural input for mental representation of the hand.

Details

Serval ID
serval:BIB_372EE4364559
Type
Article: article from journal or magazin.
Collection
Publications
Title
Impaired visual hand recognition in preoperative patients during brachial plexus anesthesia: importance of peripheral neural input for mental representation of the hand.
Journal
Anesthesiology
Author(s)
Silva S., Loubinoux I., Olivier M., Bataille B., Fourcade O., Samii K., Jeannerod M., Démonet J.F.
ISSN
1528-1175 (Electronic)
ISSN-L
0003-3022
Publication state
Published
Issued date
2011
Peer-reviewed
Oui
Volume
114
Number
1
Pages
126-134
Language
english
Notes
Publication types: Journal ArticlePublication Status: ppublish
Abstract
BACKGROUND: Perceptual illusions described in healthy subjects undergoing regional anesthesia (RA) are probably related to short-term plastic brain changes. We addressed whether performance on an implicit mental rotation task reflects these RA-induced changes in body schema brain representations. Studying these changes in healthy volunteers may shed light on normal function and the central mechanisms of pain.
METHODS: Performance pattern was studied in upper limb-anesthetized subjects on a left/right hand judgment task, which is known to involve motor imagery processes relating to hand posture. Three conditions were used: control (i.e., absence of deafferentation), RA (i.e., deafferentation), and vision (i.e., deafferentated limb exposed to view). To limit potential bias such as order effect, the control state was recorded in a randomized manner.
RESULTS: All subjects described perceptual illusions of their anesthetized limb. They were slower and less accurate on the task during RA compared with control. Response patterns were similar in all conditions, suggesting sensitivity of performance to arm/hand biomechanical constraints. Vision was associated with an increase in the proportion of correct responses and a reduction of the response times in hand judgment and was accompanied by disappearance of the lateralization of the underlying mental representations, which was identified during RA.
CONCLUSIONS: These results suggest the following: (1) the right/left judgment task involves mental simulation of hand movements, (2) underlying mental representations and their neural substrates are subject to acute alterations after RA, and (3) the proprioceptive deficit induced by RA is influenced by the subject's ability to see the anesthetized limb.
Keywords
Adult, Amides/administration & dosage, Analysis of Variance, Anesthesia, Conduction/methods, Anesthetics, Local/administration & dosage, Brachial Plexus/drug effects, Brain, Female, Hand, Humans, Illusions/drug effects, Judgment/drug effects, Male, Mental Processes/drug effects, Nerve Block/methods, Perceptual Masking, Preoperative Care, Reaction Time/drug effects, Recognition (Psychology)/drug effects, Reference Values, Task Performance and Analysis, Visual Perception/drug effects
Pubmed
Web of science
Open Access
Yes
Create date
24/03/2013 20:32
Last modification date
08/05/2019 17:04
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