Shannon entropies of the distributions of various electroencephalograms from epileptic humans

Autor:	Tuncay, Caglar
Rok vydání:	2009
Předmět:	Physics - Biological Physics Physics - Medical Physics
Druh dokumentu:	Working Paper
Popis:	1) Harmonic oscillations (HO) in numerous electroencephalograms (EEG) from different humans are introduced. 2) The probability density functions (PDF, p(X)) of the EEG voltages (X) are normal (Gauss) for OO whereas, the plots for the distributions of HO (pure) are convex. Gaussians for OO may turn to be convex as HO become dominant in MO or vice versa. However, distributions of the most of the data are found normal which means that most of the EEG oscillations consist of OO (or MO). 3) Shannon entropies (information measures) of the distributions of the data from different brain regions in the ictal intervals or inter-ictal intervals are calculated for each individual recording and compared. The averages of Shannon entropies over the individual recordings during the ictal intervals come out bigger than those from the inter-ictal intervals. These averages are found to be bigger for the data from epileptogenic brain areas than those recorded from non epileptogenic ones in different intervals. Comment: 8 pages and 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0911.1423 Zobrazit plný text záznamu View this record from Arxiv