Temporal integration of olfactory perceptual evidence in human orbitofrontal cortex.
Temporal integration of olfactory perceptual evidence in human orbitofrontal cortex.
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DOI:
10.1016/j.neuron.2012.06.035
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发表时间:
2012-09-06
期刊:
影响因子:
16.2
通讯作者:
Gottfried JA
中科院分区:
文献类型:
--
作者:
Bowman NE;Kording KP;Gottfried JA
Given a noisy sensory world, the nervous system integrates perceptual evidence over time to optimize decision-making. Neurophysiological accumulation of sensory information is well-documented in the animal visual system, but how such mechanisms are instantiated in the human brain remain poorly understood. Here we combined psychophysical techniques, drift-diffusion modeling, and functional magnetic resonance imaging (fMRI) to establish that odor evidence integration in the human olfactory system enhances discrimination on a two-alternative forced-choice task. Model-based measures of fMRI brain activity highlighted a ramp-like increase in orbitofrontal cortex (OFC) that peaked at the time of decision, conforming to predictions derived from an integrator model. Combined behavioral and fMRI data further suggest that decision bounds are not fixed, but collapse over time, facilitating choice behavior in the presence of low-quality evidence. These data highlight a key role for OFC in resolving sensory uncertainty and provide substantiation for accumulator models of human perceptual decision-making.
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影响因子:
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通讯作者:
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Schaefer, AT
DOI:
10.1196/annals.1390.022
发表时间:
2007-01-01
期刊:
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影响因子:
--
作者:
O'Doherty, John P.;Hampton, Alan;Kim, Hackjin
通讯作者:
Kim, Hackjin