April 2026 Nature Communications study maps source, sink and spiral waves via 100-electrode intracranial arrays

The April 2026 Nature Communications paper deployed intracranial grids in patients performing memory tasks and classified wave morphologies beyond prior planar models. Source waves originated at focal sites, sink waves converged on targets, and spiral waves rotated across electrode patches. Task epochs showed statistically distinct spatial patterns tied to behavioral demands rather than uniform oscillations.

Prior EEG work from the 1920s onward captured only coarse frequency bands. Intracranial sampling at roughly 100 electrodes per region supplied the spatial resolution needed to detect directional organization. The data indicate that wave geometry correlates with seconds-scale behavioral adaptation even though synaptic rewiring operates over days.

These patterns supply a candidate mechanism for rapid cortical reconfiguration without requiring structural change. If wave direction encodes routing information, existing models that treat oscillations as nonspecific activation require revision. Follow-on work must test whether disrupting specific wave trajectories impairs task performance in controlled cohorts.

Next measurements will determine whether spiral prevalence scales with task complexity across larger patient series and whether closed-loop stimulation can entrain or suppress targeted wave types.