Spatial spread of local field potential is band-pass in the primary visual cortex

Local field potential (LFP) has become a promising candidate for neural prosthesis, but how different frequencies of the LFP spread has not been studied experimentally, with theoretical models predicting either an “all-pass” (all frequencies spread equally) or “low-pass” (lower frequencies spread farther than higher frequencies) behavior. Our findings suggest that the LFP spread is “band-pass,” with frequencies in the high-gamma (60–150 Hz) range spreading significantly more than both lower (20–40 Hz) and higher (>250 Hz) frequencies.