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. Author manuscript; available in PMC: 2010 Nov 12.
Published in final edited form as: Neuron. 2009 Nov 12;64(3):404–418. doi: 10.1016/j.neuron.2009.09.020

Figure 5. Laminar-dependent structure of correlated activity.

Figure 5

(A) Two possible models for sparse population activity. Left, sparse, spatially localized model; right, sparse, spatially distributed model.

(B) Example extracellular recordings spanning multiple columns. Left, Probe configuration. Right, Spontaneous and sensory-evoked activity of simultaneously recorded cells. Rasters above and below the dashed line correspond to recording sites in superficial (putative L2/3) and deep (putative L5) layers, respectively. Colors of each raster correspond to colors of recording sites in schematic. Shaded areas denote periods of tone and click presentations.

(C) Spatial dependence of spike count correlation in superficial (left) and deep (right) layers. Asterisks indicate significant post-hoc comparisons (lsd test, p<0.05). Error bars indicate SE.