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. 2013 Nov 14;7:209. doi: 10.3389/fncel.2013.00209

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Copyright © 2013 Russo, Nieus, Maggi and Taverna.

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) or licensor 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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Electrophysiological properties and connectivity patterns of striatal FSIs. (A) Examples of different firing patterns and relative distributions. Traces are excerpts from 20 to 60 s lasting recordings in which cells were injected with suprathreshold DC (I_inj bursting: 500 pA; regular: 400 pA; irregular: 500 pA). The histogram shows relative distributions of different firing patterns. Inset: high-frequency firing activity in response to supra-threshold current pulse (700 pA, bottom trace). Calibration: 30 mV, 250 ms. (B) Confocal microphotographs showing two different FSIs filled with neurobiotin-488 (scale bars: 20 μm). (C) Left, rates of different connectivity patterns between pairs of striatal FSIs. Right, spatial distribution of connected and unconnected FSI pairs relative to the distance between cell bodies.