A system for analyzing signals representative of a subject's brain activity in a signal processor for information indicating the subject's current activity state and for detecting or predicting a change in the activity state. One preferred embodiment uses a method for estimating the Hurst parameter to perform real-time analysis of the electroencephalogram (EEG) or electrocorticogram (ECoG) signals from a subject patient for information indicative of or predictive of a seizure, and to complete the needed analysis at least before clinical seizure onset. The preferred system then performs an output task for prevention or abatement of the seizure, or for recording pertinent data.
Method and system for the prediction, rapid detection, warning, prevention, or control of changes in the brain states of a subject using hurst parameter estimation