theta power increases in the SME, localized to prefrontal and lateral temporal cortices, which vanished amid strong theta decreases (including MTL) after 500 ms post-stimulus onset. Similarly, [32] found small but significant increases in frontal theta only within 500 ms of stimulus onset, raising the possibility that these relatively weak findings reflect spectral components of the ERP and not sustained oscillatory activity. Taken together, intracranial studies largely paint a picture of theta decreases in simple memory success contrasts, and where increases in theta are found they tend to be early and brief.
