无意识
意识
断开
失忆症
麻醉
心理学
医学
神经科学
认知心理学
政治学
法学
作者
Michael T. Alkire,Anthony G. Hudetz,Giulio Tononi
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2008-11-07
卷期号:322 (5903): 876-880
被引量:1052
标识
DOI:10.1126/science.1149213
摘要
When we are anesthetized, we expect consciousness to vanish. But does it always? Although anesthesia undoubtedly induces unresponsiveness and amnesia, the extent to which it causes unconsciousness is harder to establish. For instance, certain anesthetics act on areas of the brain's cortex near the midline and abolish behavioral responsiveness, but not necessarily consciousness. Unconsciousness is likely to ensue when a complex of brain regions in the posterior parietal area is inactivated. Consciousness vanishes when anesthetics produce functional disconnection in this posterior complex, interrupting cortical communication and causing a loss of integration; or when they lead to bistable, stereotypic responses, causing a loss of information capacity. Thus, anesthetics seem to cause unconsciousness when they block the brain's ability to integrate information.
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