Single-trial gamma-band responses to efficient and inefficient visual search from frontal-parietal recording sites. A, All recording sites with a transient gamma-band response (see Materials and Methods) located in glass brain (Talairach). B, Four illustrative examples (MRI, right) of single-trial gamma-band responses to efficient (eff) and inefficient (ineff) visual search (left) recorded within 4 regions of interest of the frontal-parietal network: DLPFC (patient 5, Talairach coordinates [−58 −1 34]), dACC (patient 10, Talairach coordinates [−12 11 47]), PrCS/MFG putative FEF (patient 10, Talairach coordinates [−46 −2 34]), and IPS (patient 23, Talairach coordinates [−52 −42 46]).