Disrupted prediction-error signal in psychosis: evidence for an associative account of delusions.

Disrupted prediction-error signal in psychosis: evidence for an associative account of delusions.
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DOI:
10.1093/brain/awm173
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发表时间:
2007-09
期刊:
Brain : a journal of neurology
影响因子:
--
通讯作者:
Fletcher PC
Fletcher PC
中科院分区:
其他
文献类型:
--
作者:
Corlett PR;Murray GK;Honey GD;Aitken MR;Shanks DR;Robbins TW;Bullmore ET;Dickinson A;Fletcher PC

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Delusions are maladaptive beliefs about the world. Based upon experimental evidence that prediction error—a mismatch between expectancy and outcome—drives belief formation, this study examined the possibility that delusions form because of disrupted prediction-error processing. We used fMRI to determine prediction-error-related brain responses in 12 healthy subjects and 12 individuals (7 males) with delusional beliefs. Frontal cortex responses in the patient group were suggestive of disrupted prediction-error processing. Furthermore, across subjects, the extent of disruption was significantly related to an individual’s propensity to delusion formation. Our results support a neurobiological theory of delusion formation that implicates aberrant prediction-error signalling, disrupted attentional allocation and associative learning in the formation of delusional beliefs.
DOI: 10.1016/j.cogbrainres.2004.06.014
发表时间: 2004-11-01
期刊: COGNITIVE BRAIN RESEARCH
影响因子: --
作者:
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