A statistical analysis of electrical cerebral activity
Creators
- Bassant, Marie-Helene
- Faculte des Sciences de Paris (France)
- Commissariat a l'Energie Atomique - CEA, Centre d'Etudes Nucleaires de Fontenay-aux-Roses, Direction de la Protection et de la Surete Radiologiques, Departement de la Protection Sanitaire (France)
- Service de Sante des Armees, Laboratoire Central de l'Armement (France)
Description
The aim of this work was to study the statistical properties of the amplitude of the electroencephalographic signal. The experimental method is described (implantation of electrodes, acquisition and treatment of data). The program of the mathematical analysis is given (calculation of probability density functions, study of stationarity) and the validity of the tests discussed. The results concerned ten rabbits. Trips of EEG were sampled during 40 s. with very short intervals (500 μs). The probability density functions established for different brain structures (especially the dorsal hippocampus) and areas, were compared during sleep, arousal and visual stimulus. Using a Χ2 test, it was found that the Gaussian distribution assumption was rejected in 96.7 per cent of the cases. For a given physiological state, there was no mathematical reason to reject the assumption of stationarity (in 96 per cent of the cases). (author)
Abstract (French)
Le but de ce travail est d'etudier les proprietes statistiques des amplitudes du signal electroencephalographique. La methode experimentale est decrite (implantation d'electrodes, acquisition et traitement des donnees). Le programme d'analyse mathematique est precise (calcul des courbes de repartition statistique, etude de la stationnarite du signal) et la validite des tests, discutee. Les resultats de l'etude portent sur 10 lapins. Des sequences de 40 s d'EEG sont echantillonnees. La valeur de la tension est prelevee a un pas d'echantillonnage de 500 μs. Les courbes de repartition statistiques sont comparees d'une region de l'encephale a l'autre (l'hippocampe dorsal a ete specialement analyse) ceci pendant le sommeil, l'eveil et des stimulations visuelles. Le test du Χ2 rejette l'hypothese de distribution normale dans 97 pour cent des cas. Pour un etat physiologique donne, il n'existe pas de raison mathematique a ce que soit repoussee l'hypothese de stationnarite, ceci dans 96.7 pour cent des cas. (auteur)Files
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Additional details
Additional titles
- Original title (French)
- Contribution a l'etude de l'analyse statistique de l'activite electrique cerebrale
Identifiers
Publishing Information
- Imprint Pagination
- 184 p.
- Report number
- CEA-R--4002
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 45085863
- Subject category
- S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; S97: MATHEMATICAL METHODS AND COMPUTING;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- AMPLITUDES; BIOELECTRICITY; BRAIN; DISTRIBUTION; ELECTROENCEPHALOGRAPHY; ELECTROPHYSIOLOGY; HARMONICS; MATHEMATICAL MODELS; PATTERN RECOGNITION; PROBABILITY DENSITY FUNCTIONS; RABBITS; SLEEP; STATISTICS; STEADY-STATE CONDITIONS; STIMULI
- Descriptors DEC
- ANIMALS; BODY; CENTRAL NERVOUS SYSTEM; DIAGNOSTIC TECHNIQUES; ELECTRICITY; FUNCTIONS; MAMMALS; MATHEMATICS; NERVOUS SYSTEM; ORGANS; OSCILLATIONS; PHYSIOLOGY; VERTEBRATES
Optional Information
- Notes
- 58 refs.; Available from the INIS Liaison Officer for France, see the 'INIS contacts' section of the INIS website for current contact and E-mail addresses: http://www.iaea.org/inis/Contacts/