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Spoken words are pr...
Spoken words are processed during dexmedetomidine-induced unresponsiveness
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- Kallionpää, R. E. (författare)
- Department of Psychology and Speech-Language Pathology, and Turku Brain and Mind Center, University of Turku, Turku, Finland / Department of Perioperative Services, Intensive Care and Pain Medicine, Turku University Hospital, Turku, Finland
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- Scheinin, A. (författare)
- Department of Perioperative Services, Intensive Care and Pain Medicine, Turku University Hospital, Turku, Finland / Turku PET Centre, University of Turku and Turku University Hospital,Turku, Finland
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- Kallionpää, R. A. (författare)
- Institute of Biomedicine, University of Turku, Turku, Finland
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- Sandman, N. (författare)
- Department of Psychology and Speech-Language Pathology, and Turku Brain and Mind Center, Universityof Turku, Turku, Finland
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- Kallioinen, M. (författare)
- Department of Perioperative Services, Intensive Care and Pain Medicine, Turku University Hospital, Turku, Finland
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- Laitio, R. (författare)
- Turku PET Centre, University of Turku and Turku University Hospital,Turku, Finland
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- Laitio, T. (författare)
- Turku PET Centre, University of Turku and Turku University Hospital,Turku, Finland
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- Kaskinoro, K. (författare)
- Turku PET Centre, University of Turku and Turku University Hospital,Turku, Finland
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- Kuusela, T. (författare)
- Department of Physics and Astronomy, University of Turku, Turku, Finland
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- Revonsuo, Antti (författare)
- Högskolan i Skövde,Institutionen för biovetenskap,Forskningscentrum för Systembiologi,Department of Psychology and Speech-Language Pathology, and Turku Brain and Mind Center, University of Turku, Turku, Finland,Kognitiv neurovetenskap och filosofi, Consciousness and Cognitive Neuroscience
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- Scheinin, H. (författare)
- Department of Perioperative Services, Intensive Care and Pain Medicine, Turku University Hospital, Turku, Finland / Turku PET Centre, University of Turku and Turku University Hospital,Turku, Finland / Integrative Physiology and Pharmacology,Institute of Biomedicine, University of Turku, Turku, Finland
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- Valli, Katja, 1973- (författare)
- Högskolan i Skövde,Institutionen för biovetenskap,Forskningscentrum för Systembiologi,Department of Psychology and Speech-Language Pathology, and Turku Brain and Mind Center, University of Turku, Turku, Finland / Department of Perioperative Services, Intensive Care and Pain Medicine, Turku University Hospital, Turku, Finland,Kognitiv neurovetenskap och filosofi, Consciousness and Cognitive Neuroscience
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(creator_code:org_t)
- Elsevier, 2018
- 2018
- Engelska.
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Ingår i: British Journal of Anaesthesia. - : Elsevier. - 0007-0912 .- 1471-6771. ; 121:1, s. 270-280
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Abstract
Ämnesord
Stäng
- Background: Studying the effects of anaesthetic drugs on the processing of semantic stimuli could yield insights into how brain functions change in the transition from wakefulness to unresponsiveness. Here, we explored the N400 event-related potential during dexmedetomidine- and propofol-induced unresponsiveness. Methods: Forty-seven healthy subjects were randomised to receive either dexmedetomidine (n = 23) or propofol (n = 24) in this open-label parallel-group study. Loss of responsiveness was achieved by stepwise increments of pseudo-steady-state plasma concentrations, and presumed loss of consciousness was induced using 1.5 times the concentration required for loss of responsiveness. Pre-recorded spoken sentences ending either with an expected (congruous) or an unexpected (incongruous) word were presented during unresponsiveness. The resulting electroencephalogram data were analysed for the presence of the N400 component, and for the N400 effect defined as the difference between the N400 components elicited by congruous and incongruous stimuli, in the time window 300-600 ms post-stimulus. Recognition of the presented stimuli was tested after recovery of responsiveness. Results: The N400 effect was not observed during dexmedetomidine- or propofol-induced unresponsiveness. The N400 component, however, persisted during dexmedetomidine administration. The N400 component elicited by congruous stimuli during unresponsiveness in the dexmedetomidine group resembled the large component evoked by incongruous stimuli at the awake baseline. After recovery, no recognition of the stimuli heard during unresponsiveness occurred. Conclusions: Dexmedetomidine and propofol disrupt the discrimination of congruous and incongruous spoken sentences, and recognition memory at loss of responsiveness. However, the processing of words is partially preserved during dexmedetomidine-induced unresponsiveness.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Neurovetenskaper (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Neurosciences (hsv//eng)
Nyckelord
- dexmedetomidine
- event-related potentials
- N400 evoked potential
- propofol
- semantics
- Consciousness and Cognitive Neuroscience
- Kognitiv neurovetenskap och filosofi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Kallionpää, R. E ...
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Scheinin, A.
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Kallionpää, R. A ...
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Sandman, N.
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Kallioinen, M.
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Laitio, R.
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visa fler...
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Laitio, T.
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Kaskinoro, K.
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Kuusela, T.
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Revonsuo, Antti
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Scheinin, H.
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Valli, Katja, 19 ...
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- Om ämnet
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- MEDICIN OCH HÄLSOVETENSKAP
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MEDICIN OCH HÄLS ...
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och Medicinska och f ...
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och Neurovetenskaper
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Högskolan i Skövde