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. 2014 Jan 30;8:5. doi: 10.3389/fnsys.2014.00005

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Copyright © 2014 Smith, Galvan, Ellender, Doig, Villalba, Huerta-Ocampo, Wichman and Bolam.

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 responses of striatal neurons to electrical stimulation of CM in awake monkeys. Electrical stimulation (100 Hz, 100 pulses-shaded area) of CM evokes responses in PANs (putatively MSNs) and TANs (putatively cholinergic interneurons) in awake rhesus monkeys. (A) Example of a PAN responding with increased firing to electrical CM stimulation. (B) Example of a TAN responding with a brief decrease followed by an increase in firing to CM stimulation. The histograms and rasters are aligned to the start of stimulation trains. (C) Summary of responses. The majority of PANs display increases or decreases in firing rate, while most TANs present combinatory (increases and decreases) responses following CM stimulation (see Nanda et al., 2009 for more details).