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. Author manuscript; available in PMC: 2020 Mar 1.
Published in final edited form as: Hippocampus. 2018 Nov 13;29(3):260–274. doi: 10.1002/hipo.22994

Figure 7. Increasing the number of layer I neurons result in off-center, on-surround receptive fields for time cells.

Figure 7.

We showed that as the nearby time constants get closer, the shape of the receptive field becomes similar to an off-center, on-surround one. We simulated the network activity using an augmented version of the model with 99 time constants for layer I neurons spanning 2s-50s. The resulting receptive fields become almost off-center, on-surround (a right, distance indicates the distance from the layer II neuron with the same label s as the output layer neuron (black circles, a left), line thickness in a left schematically represents the amplitude of the receptive fields). The firing rates of the time cells still remain scale-invariant (b top, activity of 6 representative time cells. b bottom: the firing rates rescaled along the x axis by peak time.)