Fronto-temporal Delta-gamma Imbalance as a Neural Correlate of Hyperacusis in Tinnitus: An Exploratory EEG Study

In this small, exploratory extreme-group study, a right fronto-temporal delta-gamma imbalance emerged as a candidate connectivity signature of objectively verified hyperacusis in tinnitus. The gamma reduction, partially supported by wPLI analysis, represents the more robust finding, while the delta increase warrants cautious interpretation given its absence in wPLI. Because no features survived FDR correction and CIs were wide, the results are preliminary and warrant replication in larger cohorts.