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. Author manuscript; available in PMC: 2016 Oct 1.
Published in final edited form as: Neuroscientist. 2015 Feb 17;22(2):145–164. doi: 10.1177/1073858415571539

Figure 4.

Figure 4

Frequency response functions of neuronal populations and response to input steps. (A) Experimentally measured frequency response functions of pyramidal neurons from layer 2/3 (red) and layer 5 (blue) in slices from rat visual cortex. Vertical bars indicate standard error of the mean (SEM). (B) Relation between high-frequency cutoff (fc) of transfer function and dynamics of responses to step-changes of the input. Calculated responses of an idealized system that transfers only frequencies <fc but eliminates frequencies >fc. fc = 1000 Hz, 400 Hz, 200 Hz, and 100 Hz, as indicated. Dashed vertical line indicates the onset of input step (top black trace). Dashed fragmented lines between A and B are for illustration of the relation between measured transfer functions of cortical neurons in A and cutoff frequencies used for calculation of responses in B.