Fig. 4: Histological mapping of spectrolaminar motif of relative LFP power with respect to anatomical layers.
From: A ubiquitous spectrolaminar motif of local field potential power across the primate cortex
a, Example histological Nissl-stained section in area LIP in monkey Sh showing a clear electrolytic lesion (dark spot; see white arrows). Reconstructed probe channels are shown in white. The laminar position of layer 4 is outlined in yellow. The red, green and blue dots correspond to the channel with highest gamma power, the alpha-beta/gamma crossover and the channel with highest alpha-beta power on the probe. b, Same as a but for area LPFC in monkey St. c, For each independent probe in area LIP (n = 8), we performed probe reconstructions shown in a and b and then measured the distance from each physiological landmark (gamma peak power in red, alpha-beta peak power in blue, crossover in green and CSD sink in yellow) to the center of layer 4 in micrometers. Each black line is an independent probe. The mean ± s.e.m. and s.d. are indicated with horizontal colored lines. Gray dashed lines indicate the mean laminar boundaries for that area. d, Same as c but for area LPFC (n = 10). e, Histograms of the layers where the four physiological measures were found across all available data (LIP, LPFC, MST and V1, n = 23 probes for Gamma/Alpha-beta/Cross, and n = 14 probes for CSD sink). Median ± 95% CI and s.d. are indicated with horizontal colored lines. CSF, cerebrospinal fluid; L, layer; RPar, right parietal cortex tissue block; RPFC, right lateral prefrontal cortex tissue block; WM, white matter.
