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Titolo:
EEG bands during wakefulness, slow-wave, and paradoxical sleep as a resultof principal component analysis in the rat
Autore:
Corsi-Cabrera, M; Perez-Garci, E; Del Rio-Portilla, Y; Ugalde, E; Guevara, MA;
Indirizzi:
UNAM, Fac Psicol, Mexico City 04510, DF, Mexico UNAM Mexico City DF Mexico 04510 ac Psicol, Mexico City 04510, DF, Mexico Univ Guadalajara, Inst Neurociencias, Guadalajara, Spain Univ GuadalajaraGuadalajara Spain st Neurociencias, Guadalajara, Spain
Titolo Testata:
SLEEP
fascicolo: 4, volume: 24, anno: 2001,
pagine: 374 - 380
SICI:
0161-8105(20010615)24:4<374:EBDWSA>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
EYE-MOVEMENT SLEEP; FREELY MOVING RAT; THETA-RHYTHM; CORTICAL TEMPERATURE; VIGILANCE STATES; POWER SPECTRA; DEPRIVATION; BEHAVIOR; FREQUENCY; ELECTROCORTICOGRAM;
Keywords:
EEG; spectral analysis; rat; NREM sleep; REM sleep; wakefulness; principal component analysis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
55
Recensione:
Indirizzi per estratti:
Indirizzo: Corsi-Cabrera, M UNAM, Fac Psicol, Av Univ 3004,Copilco Univ, Mexico City 04510, DF, Mexico UNAM Av Univ 3004,Copilco Univ Mexico City DF Mexico 04510
Citazione:
M. Corsi-Cabrera et al., "EEG bands during wakefulness, slow-wave, and paradoxical sleep as a resultof principal component analysis in the rat", SLEEP, 24(4), 2001, pp. 374-380

Abstract

Rat EEG has been empirically divided in bands that frequently do not correspond with EEG generators nor with the functional meaning of EEG rhythms. Power spectra from wakefulness (W), slow-wave sleep (SWS), and paradoxicalsleep (PS) of Wistar rats were submitted to Principal Component Analyses (PCA) to investigate which frequencies are covariant. Three independent eigenvectors were identified for SWS: a band between 1-6, an intermediate band between 7-15, and a fast band between 16-32 Hz (90.74% of the variance); two independent eigenvectors were extracted for PS: slow frequencies between 1-6 covarying together with frequencies between 11-16 Hz, and activity between 6-10 covarying together with fast frequencies between 17-32 Hz (80.38% of the variance); four eigenvectors were obtained for W: 3-7, 8-9, 10-21 and 21-32 Hz (81.47% of the variance). Vigilance states showed significant differences in AP from 1 to 22 Hz. PCA extracted broad bands different for each vigilance state, which included the most representative EEG activities characteristic of them. These results indicate that during SWS, slow oscillations include frequencies up to 6 Hz, and spindle oscillations frequencies down to 7 Hz. No alpha frequencies were identified as an independent band. Frequencies within theta and beta were gathered in the same eigenvector during PS and in different eigenvectors during W suggesting coordinated activation of hippocampal and corticalsystems during PS. These bands are consistent with the underlying neurophysiological mechanisms of sleep and wakefulness and with firing frequencies of generators of rhythmic activity obtained in cellular studies in animals.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 08:17:40