Supplementary Figure 1: Hippocampal recordings. | Nature Neuroscience

Supplementary Figure 1: Hippocampal recordings.

From: Hierarchical nesting of slow oscillations, spindles and ripples in the human hippocampus during sleep

Supplementary Figure 1

a. (top) Post-operative MRI (left, depicting a depth electrode implanted along the longitudinal hippocampal axis) and co-registered pre-operative MRI (right) of a sample participant. (bottom) Power spectra (NREM/WAKE) for all 10 electrode contacts of the same participant, showing a maximum in the spindle range (12-16 Hz, dashed vertical lines) in a posterior hippocampus contact which was then carried forward to the group analysis (red arrow). (inset) NREM/WAKE power spectrum for scalp electrode Cz. Y axes are identical across panels, where a ratio of 1 demarks the same spectral power during NREM and WAKE. b. Hippocampal contacts included in the analysis for all participants. Each panel shows sagittal and coronal slices of the post-operative (top) and the co-registered pre-operative (bottom) MRI for a participant. Crosshairs highlight the contact showing the largest spindle amplitudes during NREM sleep relative to WAKE of all hippocampal contacts (as shown in a for a sample participant). MRIs were unavailable for 3 of the 12 participants. Note the different implantation scheme in one participant (right bottom).

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