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. Author manuscript; available in PMC: 2016 Oct 7.
Published in final edited form as: Neuron. 2015 Oct 7;88(1):220–235. doi: 10.1016/j.neuron.2015.09.034

Figure 4. The gamma cycle implements pulsatile neuronal representations.

Figure 4

(A-C) Awake monkey V1 single unit during visual stimulation with a drifting grating (adapted and modified from (Womelsdorf et al., 2012)). (A) Spike probability as function of the gamma phase in LFPs, which were recorded simultaneously from separate nearby electrodes. (B) The colored bar shows the partitioning of the gamma cycle into eight phase bins containing equal numbers of spikes (aligned to the phase in the gamma cycle to which spikes synchronized on average). Orientation tuning curves calculated separately for the eight gamma phase bins show a strong modulation of orientation selectivity with gamma phase, even though spike count was equal. (C) Orientation selectivity index (OSI) as function of the gamma phase bin, in which the spikes occurred.