Individual Frequency Signature In Human Brain Activity

Eshel Ben-Jacob, The Maguy-Glass Chair in Physics of Complex Systems, Former President of the Israel Physical Society, Tel Aviv University, Israel
in cooperation with Itai Doron, Eden Refaeli, Eyal Hulata, Leo Towle and Oren Sagher

The various human brain tasks are performed at different locations and time scales. Hence the activity is non ergodic. Yet, we discovered the existence of time-invariant (above an essential time scale) partitioning of the brain activity into frequency bands. These frequency bands vary from person to person thus they represent an individual frequency signature. For deciphering the frequency bands, we perform temporal and ensemble averagin of best wavelet packet bases from multi-electrode EEG recordings. The individual frequency signature provide new templates for quantitative analyses of various brain functioning disorders, e.g., epileptic brain activity. They also provide a new way to identify normal vs. non normal brain activity

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