Functional neuroimaging of belief, disbelief, and uncertainty
Article first published online: 10 DEC 2007
Copyright © 2007 American Neurological Association
Annals of Neurology
Volume 63, Issue 2, pages 141–147, February 2008
How to Cite
Harris, S., Sheth, S. A. and Cohen, M. S. (2008), Functional neuroimaging of belief, disbelief, and uncertainty. Ann Neurol., 63: 141–147. doi: 10.1002/ana.21301
- Issue published online: 27 FEB 2008
- Article first published online: 10 DEC 2007
- Manuscript Accepted: 12 OCT 2007
- Manuscript Revised: 8 OCT 2007
- Manuscript Received: 30 AUG 2007
The difference between believing and disbelieving a proposition is one of the most potent regulators of human behavior and emotion. When one accepts a statement as true, it becomes the basis for further thought and action; rejected as false, it remains a string of words. The purpose of this study was to differentiate belief, disbelief, and uncertainty at the level of the brain.
We used functional magnetic resonance imaging (fMRI) to study the brains of 14 adults while they judged written statements to be “true” (belief), “false” (disbelief), or “undecidable” (uncertainty). To characterize belief, disbelief, and uncertainty in a content-independent manner, we included statements from a wide range of categories: autobiographical, mathematical, geographical, religious, ethical, semantic, and factual.
The states of belief, disbelief, and uncertainty differentially activated distinct regions of the prefrontal and parietal cortices, as well as the basal ganglia.
Belief and disbelief differ from uncertainty in that both provide information that can subsequently inform behavior and emotion. The mechanism underlying this difference appears to involve the anterior cingulate cortex and the caudate. Although many areas of higher cognition are likely involved in assessing the truth-value of linguistic propositions, the final acceptance of a statement as “true” or its rejection as “false” appears to rely on more primitive, hedonic processing in the medial prefrontal cortex and the anterior insula. Truth may be beauty, and beauty truth, in more than a metaphorical sense, and false propositions may actually disgust us. Ann Neurol 2007