Overall, these results suggest that PVI suppression has unsystematic, marginally significant effects on STRF tuning but has an appreciable systematic effect on neuronal gain.
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Contrast gain control occurs independently of both parvalbumin-positive interneuron activity and shunting inhibition in auditory cortex.
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The sentences
We observed a borderline significant change in mean BF, although median values remained unchanged between light-off and light-on conditions (light-off median: 9.51 kHz, light-on median: 9.51 kHz; light-off mean: 7.61 kHz, light-on mean: 7.81 kHz; signed-rank test, P = 0.047; Fig. 4 C ).