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. 2022 May 18;16:884128. doi: 10.3389/fnins.2022.884128

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Copyright © 2022 Müller, Arnold, Breitwieser, Czierlinski, Emmel, Kaiser, Mauch, Schmitt, Spilger, Stock, Stradmann, Weis, Baumbach, Billaudelle, Cramer, Ebert, Göltz, Ilmberger, Karasenko, Kleider, Leibfried, Pehle and Schemmel.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Pulse propagation along a dendrite which branches into two sub-branches. (A) Each branch is modeled by two compartments (rectangles). Different compartments are connected via resistors (lines). (B) Hardware configuration: neuron circuits (squares) are arranged in two rows on BSS-2, compare Figure 1D. Each compartment is represented by at least two neuron circuits. Circuits which form a single compartment are directly connected via switches (straight lines); compartments are connected via resistors. For details see Kaiser et al. (2022). (C) Membrane responses to synaptic input: we inject synaptic input at four different compartments; the compartment at which the input is injected is marked by a *. The membrane traces of the different compartments are arranged as in (A). For the top left quadrant (i) the input is injected in the first compartment and decreases in amplitude while it travels along the chain. The response in both branches is symmetric. A similar behavior can be observed when the input is injected in the second compartment, (ii). Due to the symmetry of the model, we only display membrane responses for synaptic input to the upper branch. When injecting the input in the first compartment of the upper branch, (iii), the input causes a noticeable depolarization within the same branch and the main branch but does not cause a strong response in the lower sister branch. All values are given in the hardware domain.