Largest window for spectral analysis: the run (here 28.5 sec) Largest window for spectral analysis: the trial (here 6 sec) STEADY-STATE, e.g. multimodal binding STRUCTURED TASK e.g. imitation task a plateau an event a quasi-stationary brain state A predetermined temporal window (here centered at the grip) a homogenous behavioral state a quasi-stationary brain state
infinite Task-scale process REST Task related (local area) Brain state (local and network), transients
Sustained rhythms like alpha in drowsy subjects are often with poor task specificity. They are not necessary to perform the task They may have good inter and intra-individual consistency They dont tell us a lot about the task … yet they are quite systematically modulated by the task Transients (dead zone of electro-physiologists) may be key to the behavioral or cognitive state under investigation. Especially, coordinated brain state are typically brief.