Supplementary Figure 1: Basic LFP and single-unit spiking characteristics.
From: Correlation structure of grid cells is preserved during sleep
a: Example traces of MEC activity during RUN, SWS and REM. From top to bottom: combined spike rate of all recorded units; spike rasters for 8 grid cells; wideband LFP signal. b: MEC LFP power spectra generated from the recording shown in (a) (n = 1 recording, durations in minutes: RUN 34.0, SWS 222, REM 30.4). The power spectra were calculated in 5-second windows using the multitaper method, using all available time periods for each state. The lines and shaded areas represent mean ± S.E.M. c: Distributions of mean spike rates of all units during RUN, SWS and REM (n = 138 grid cells, 95 HD cells, 39 grid/HD cells). Box indicates median and quartiles; whiskers indicate 1.5 × interquartile range below or above the first and third quartiles respectively. d: Comparison of mean spike rates of grid, HD and grid/HD cells between RUN, SWS and REM. Cell types are displayed in the same vertical order as in (c). e: Distribution of functional unit types among parahippocampal subregions. “PaS” refers to parasubiculum; “POR-RSC-PaS” refers to the transitional area between postrhinal cortex, retrosplenial cortex and PaS.
