Fig. 6: Theta oscillations and phase locking in MEC neurons under three landmark conditions. | Microsystems & Nanoengineering

Fig. 6: Theta oscillations and phase locking in MEC neurons under three landmark conditions.

From: Grid cell remapping under three-dimensional object and social landmarks detected by implantable microelectrode arrays for the medial entorhinal cortex

Fig. 6

a Dashed white circles in the firing rate map indicate the areas of firing fields, dividing the activities of rats into the two groups of ‘in the field’ and ‘out the field’ segments (left). The averaged normalized PSD (%) of the LFPs of ‘in the field’ and ‘out the field’ segments revealed the obviously high power of the theta band (5–8 Hz) in the firing fields (right). b Top: the synchronous LFPs and spikes of a typical grid cell (GC) and nongrid cell (NC) recorded by an MEA in the trial shown in (a). Bottom: a piece of LFPs and spikes of NC (left) and GC (right) indicated in the top signals. Middle waves between LFPs and spikes are theta waves filtered in the 5–8 Hz range. Tick marks of spike timestamps are locked in troughs of LFPs and theta waves (p < 0.05, Rayleigh test). c Spike probability of a typical grid cell in three trials with PL, OL, and SL as a function of theta phase. d Averaged spike probability of all grid cells in all trials as a function of theta phase. Dotted lines indicate the standard error of the mean (n = 18)

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