Delta (~0.5–4 Hz) |
Decreased phase-amplitude coupling with γ yields increased visual attention, suggesting that cross-frequency coupling suppression modulates attention. |
Increased in eyes-closed resting state exam; predicted to be disrupted in processing phrases involving raising and passives. |
Theta (~4–10 Hz) |
Decreased phase-amplitude coupling with γ yields increased visual attention; greater HPC-PFC synchrony after object pair association errors. |
Reduced cross-frequency coupling with γ; does not synergistically engage with γ during speech; predicted to be disrupted in certain memory retrieval processes. |
Alpha (~8–12 Hz) |
Increased synchrony with β during correct object pair associations. |
Reduced cross-cortically; reduced resting-state α-γ phase amplitude coupling; increased in resting state; predicted to be disrupted during certain lexicalizations. |
Beta (~10–30 Hz) |
Increased synchrony with α during object pair associations; increases during continuation phase of a synchronization-continuation task. |
Reduced in picture-naming tasks; predicted to be disrupted in the maintenance of syntactic objects in raising, passives and wh-questions. |
Gamma (~30–100 Hz) |
Involved in processing snake and face images increases during action sequence updating and memory consolidation, reactivation, and transfer. |
Over-connectivity gives rise to increased γ; reduced in rSTG and lIFG during picture naming; predicted to be disrupted quite generally in linguistic cognition. |