Brain maps of Iowa gambling task

Somatic Marker Hypothesis (SMH), based on clinical observations, delineates neuronal networks for interpreting consciousness generation and decision-making. The Iowa gambling task (IGT) was designed to verify the SMH. However, more and more behavioral and brain imaging studies had reported incongrue...

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Bibliographic Details
Published in:BMC neuroscience 2008-07, Vol.9 (1), p.72-72, Article 72
Main Authors: Lin, Ching-Hung, Chiu, Yao-Chu, Cheng, Chou-Ming, Hsieh, Jen-Chuen
Format: Article
Language:English
Subjects:
Adult
Basal Ganglia - physiology
Brain
Brain - physiology
Cerebral Cortex - physiology
Decision Making - physiology
Diagnostic imaging
Emotions - physiology
Female
Gambling - psychology
Games, Experimental
Health aspects
Humans
Image Processing, Computer-Assisted
Magnetic Resonance Imaging
Male
Neuropsychological Tests
Parietal Lobe - physiology
Physiological aspects
Prefrontal Cortex - physiology
Psychological Theory
Punishment - psychology
Risk-Taking
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Summary:Somatic Marker Hypothesis (SMH), based on clinical observations, delineates neuronal networks for interpreting consciousness generation and decision-making. The Iowa gambling task (IGT) was designed to verify the SMH. However, more and more behavioral and brain imaging studies had reported incongruent results that pinpointed a need to re-evaluate the central representations of SMH. The current study used event-related fMRI (functional Magnetic Resonance Imaging) to examine neural correlates of anticipation vs. outcome, wins vs. losses, and differential decks' contingencies of IGT. Behavioral results showed a prominent effect of frequency in driving choices. The insula and basal ganglia were activated during the anticipation phase while the inferior parietal lobule was activated during the outcome phase. The activation of medial prefrontal cortex was especially targeted during the high punishment contingencies. The data suggest that under uncertainty the normal decision makers can become myopic. The insula and basal ganglia might play a vital role in long-term guidance of decision-making. Inferior parietal lobule might participate in evaluating the consequence and medial prefrontal cortex may service the function of error monitoring.
ISSN:1471-2202
1471-2202
DOI:10.1186/1471-2202-9-72