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Decision time, slow inhibition, and theta rhythm
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Smerieri, Anteo, Rolls, Edmund T. and Feng, Jianfeng (2010) Decision time, slow inhibition, and theta rhythm. Journal of Neuroscience, The, Vol.30 (No.42). pp. 14173-14181. doi:10.1523/JNEUROSCI.0945-10.2010 ISSN 0270-6474.
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Official URL: http://dx.doi.org/10.1523/JNEUROSCI.0945-10.2010
Abstract
In this paper, we examine decision making in a spiking neuronal network and show that longer time constants for the inhibitory neurons
can decrease the reaction times and produce theta rhythm.We analyze the mechanism and find that the spontaneous firing rate before the
decision cues are applied can drift, and thereby influence the speed of the reaction time when the decision cues are applied. The drift of the
firing rate in the population that will win the competition is larger if the time constant of the inhibitory interneurons is increased from 10
to 33 ms, and even larger if there are two populations of inhibitory neurons with time constants of 10 and 100 ms. Of considerable interest
is that the decision that will be made can be influenced by the noise-influenced drift of the spontaneous firing rate over many seconds
before the decision cues are applied. The theta rhythm associated with the longer time constant networks mirrors the greater integration
in the firing rate drift produced by the recurrent connections over long time periods in the networks with slow inhibition. The mechanism
for the effect of slow waves in the theta and delta range on decision times is suggested to be increased neuronal spiking produced by
depolarization of the membrane potential on the positive part of the slow waves when the neuron’s membrane potential is close to the
firing threshold.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QP Physiology | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Centre for Scientific Computing Faculty of Science, Engineering and Medicine > Science > Computer Science |
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Library of Congress Subject Headings (LCSH): | Decision making, Neural networks (Neurobiology), Theta rhythm, Reaction time | ||||
Journal or Publication Title: | Journal of Neuroscience, The | ||||
Publisher: | Society for Neuroscience | ||||
ISSN: | 0270-6474 | ||||
Official Date: | 20 October 2010 | ||||
Dates: |
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Volume: | Vol.30 | ||||
Number: | No.42 | ||||
Page Range: | pp. 14173-14181 | ||||
DOI: | 10.1523/JNEUROSCI.0945-10.2010 | ||||
Status: | Peer Reviewed | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Funder: | Seventh Framework Programme (European Commission) (FP7) | ||||
Grant number: | 213219 (FP7) |
Data sourced from Thomson Reuters' Web of Knowledge
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