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. Author manuscript; available in PMC: 2011 Dec 22.
Published in final edited form as: Neuron. 2010 Dec 22;68(6):1043–1050. doi: 10.1016/j.neuron.2010.11.029

Figure 2. IEG-expressing neurons fire at higher frequencies during network activity.

Figure 2

(A–B) Spontaneous firing activity from a pair of simultaneously-recorded fosGFP− and fosGFP+ neurons (A) and ArcGFP− and ArcGFP+ neurons (B). Traces have been offset for clarity. Inset below (●) shows higher temporal resolution of firing. (C) The number of spikes per epoch was significantly different for fosGFP− (black) and fosGFP+ (green) cells (n=number of epochs for each group). The frequency of depolarizing epochs for simultaneously recorded fosGFP+ and fosGFP− cells is similar (p=0.14). (D) Same as in (C) but for ArcGFP − (black) and ArcGFP+ (green) cells. (E) Example traces showing depolarizing epochs begin earlier for fosGFP+ cells (dotted line) compared to simultaneously-recorded fosGFP− cells. (F) Histogram of the timing of epoch onset for a representative subset of fosGFP− cells relative to fosGFP+ cells. Epoch onset times for fosGFP− cells are shifted later (0=time of epoch onset for fosGFP+ cells; green arrow).