[extropy-chat] Neuro: Decision Nets

Ian Goddard iamgoddard at yahoo.com
Fri Apr 8 04:10:52 UTC 2005

Have researchers found "an area [in the brain] that
integrates sensory evidence needed to support a
perceptual decision"?

Trends in Cognitive Sciences, 9.2 2005(41-43):

A general mechanism for decision-making in the human

A new fMRI study by Heekeren and colleagues suggests
that left dorsolateral prefrontal cortex (DLPFC)
contains a region that integrates sensory evidence
supporting perceptual decisions. DLPFC meets two
criteria posited by Heekeren et al. for such a region:
(1) its activity is correlated in time with the output
of sensory areas of the visual cortex measured
simultaneously, and (2) as expected of an integrator,
its activity is greater on trials for which the
sensory evidence is substantial than on trials for
which the sensory evidence is weak. Complementary
experiments in humans and monkeys now offer a
realistic hope of elucidating decision-making networks
in the primate brain.



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