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. 2011 Feb 23;31(8):2843–2854. doi: 10.1523/JNEUROSCI.4869-10.2011

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Copyright © 2011 the authors 0270-6474/11/312843-12$15.00/0

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Figure 11. — Relatively weak theta modulation in ventral striatal spiking. Shown are the average autocorrelograms for phasically firing neurons (PFN) (putative medium spiny neurons) and high-firing neurons (HFN) (putative fast-spiking interneurons) in VS (top row) and for putative hippocampal pyramidal neurons (pyr) and interneurons (int; HC, bottom row). Note how the clear theta modulation in the hippocampal neurons is nearly absent from the ventral striatal population. Even if only phase precessing ventral striatal neurons are considered (top left, inset), theta modulation is noticeably weaker than that in hippocampal neurons. Autocorrelograms were constructed by counting the number of spike pairs at a given time lag (in 5 ms bins) and normalizing by the total number of counts in the 500 ms window shown.