Fig. 5.

Example modulation depth function (MDF), derived from the same neuron whose responses were depicted in Fig. 2. Figure conventions follow those in Fig. 2. The horizontal bars above the FTF in A indicate modulation depths of the stimuli comprising the MDF. Confusion matrices for the spike train classifiers are included as insets in B (rate-only) and C (full spike train and phase-only). Narrowing of MPH peaks in D reflects the fact that increasing the modulation depth at a constant modulation frequency increases the rate at which the carrier frequency is modulated, diminishing the time that the signal spends within the neuron's frequency response area. rMDF, rate-based MDF; tMDF, temporally-based MDF.