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. Author manuscript; available in PMC: 2014 Oct 16.
Published in final edited form as: Neuron. 2013 Oct 16;80(2):10.1016/j.neuron.2013.08.038. doi: 10.1016/j.neuron.2013.08.038

Figure 1. Chronic multiunit recording from V1 of freely behaving rats.

Figure 1

(A) Location of implanted microwires (arrowheads), overlaid with diagram of coronal section of rat V1m (modified from Paxinos and Watson, 1997). (B) Average LFP response from layer 2/3 to 50×50 msec light pulses delivered at 1 Hz (gray bar). (C) Raw traces collected on a single wire originating from two units. (D) Example of principal components clustering of units in C. Individual spikes are represented as points in eigenspace defined by the first four principal components. The clustering algorithm identifies discrete clusters (pink and green). (E) Plot of spike trough-to-peak vs slope between 0.25–0.57 ms after the spike trough revealed a bimodal distribution that corresponds to pFS cells (pink) and RSUs (green). Inset: mean and peak firing rates of the RSU and pFS populations. (F) Heat map of 150 minutes of firing from 5 neurons recorded simultaneously on a single array. All error bars indicate ±SEM.