Auditory stimulation does not induce implicit memory during anaesthesia

Details

Serval ID
serval:BIB_E6D8327CDC57
Type
Inproceedings: an article in a conference proceedings.
Publication sub-type
Abstract (Abstract): shot summary in a article that contain essentials elements presented during a scientific conference, lecture or from a poster.
Collection
Publications
Institution
Title
Auditory stimulation does not induce implicit memory during anaesthesia
Title of the conference
Annual meeting of the Swiss Society of Anaesthesiology and Resuscitation
Author(s)
Albrecht E., Aberg K.C., Tartaglia E.M., Soom P., Farron A., Kern C., Herzog M.H.
Address
Interlaken, Switzerland, October 29-31, 2009
ISBN
1424-7860
Publication state
Published
Issued date
2009
Peer-reviewed
Oui
Volume
139
Series
Swiss Medical Weekly
Pages
8S-8S
Language
english
Notes
Meeting Abstract
Abstract
Background and aim of the study: Formation of implicit memory during general anaesthesia is still debated. Perceptual learning is the ability to learn to perceive. In this study, an auditory perceptual learning paradigm, using frequency discrimination, was performed to investigate the implicit memory. It was hypothesized that auditory stimulation would successfully induce perceptual learning. Thus, initial thresholds of the frequency discrimination postoperative task should be lower for the stimulated group (group S) compared to the control group (group C).
Material and method: Eighty-seven patients ASA I-III undergoing visceral and orthopaedic surgery during general anaesthesia lasting more than 60 minutes were recruited. The anaesthesia procedure was standardized (BISR monitoring included). Group S received auditory stimulation (2000 pure tones applied for 45 minutes) during the surgery. Twenty-four hours after the operation, both groups performed ten blocks of the frequency discrimination task. Mean of the thresholds for the first three blocks (T1) were compared between groups.
Results: Mean age and BIS value of group S and group C are respectively 40 } 11 vs 42 } 11 years (p = 0,49) and 42 } 6 vs 41 } 8 (p = 0.87). T1 is respectively 31 } 33 vs 28 } 34 (p = 0.72) in group S and C.
Conclusion: In our study, no implicit memory during general anaesthesia was demonstrated. This may be explained by a modulation of the auditory evoked potentials caused by the anaesthesia, or by an insufficient longer time of repetitive stimulation to induce perceptual learning.
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Create date
19/11/2009 11:09
Last modification date
20/08/2019 16:09
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