Timing using temporal context.

Brain Research
Karthik H Shankar, Marc W Howard

Abstract

We present a memory model that explicitly constructs and stores the temporal information about when a stimulus was encountered in the past. The temporal information is constructed from a set of temporal context vectors adapted from the temporal context model (TCM). These vectors are leaky integrators that could be constructed from a population of persistently firing cells. An array of temporal context vectors with different decay rates calculates the Laplace transform of real time events. Simple bands of feedforward excitatory and inhibitory connections from these temporal context vectors enable another population of cells, timing cells. These timing cells approximately reconstruct the entire temporal history of past events. The temporal representation of events farther in the past is less accurate than for more recent events. This history-reconstruction procedure, which we refer to as timing from inverse Laplace transform (TILT), displays a scalar property with respect to the accuracy of reconstruction. When incorporated into a simple associative memory framework, we show that TILT predicts well-timed peak responses and the Weber law property, like that observed in interval timing tasks and classical conditioning experiments.

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Citations

Sep 17, 2011·Neural Computation·Karthik H Shankar, Marc W Howard
Jan 22, 2014·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Christopher J MacDonald
Apr 18, 2014·Journal of Integrative Neuroscience·Eva Čadež
Jul 22, 2018·Journal of Vision·Ljubica Jovanovic, Pascal Mamassian
Jan 19, 2019·Nature Communications·Warrick RoseboomAnil K Seth

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