Figure 4: BF of Single Pyramidal Neurons Shifts with the Intensity. | Scientific Reports

Figure 4: BF of Single Pyramidal Neurons Shifts with the Intensity.

From: Bidirectional Shifting Effects of the Sound Intensity on the Best Frequency in the Rat Auditory Cortex

Figure 4

(A) TRF of a single excitatory neuron. Left, spike tonal receptive field composed of 568 traces in response to tones at different frequencies and intensities. Right panel, 50 randomly chosen superimposed spike waveforms and the reconstructed morphology of a L4 pyramidal neuron. (B) Color map of the TRF. The color represents the averaged spike number. The white stars represent the BFs at the different intensities. The horizontal arrow indicates the difference between the BF at 70 dB SPL and at threshold intensity. (C) Raster plot of the CF versus the BF shift for each recorded neuron, n = 52. (D) Averaged BF shift curve for the low- and high-CF groups. Bar, S.D. (E) Percentage of shift directions for the low (2–32 kHz)- and high (32–64 kHz)-CF groups. (F) Normalized firing rate at the BF (solid line) and CF (dashed line) at each intensity (threshold to 40 dB above threshold), **p < 0.01, *p < 0.05, paired t-test.

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