Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
SEX AND ELECTROENCEPHALOGRAPHIC SYNCHRONIZATION AFTER PHOTIC-STIMULATION PREDICT SIGNAL CHANGES IN THE VISUAL-CORTEX ON FUNCTIONAL MR-IMAGES
Autore:
HEDERA P; WU D; COLLINS S; LEWIN JS; MILLER D; LERNER AJ; KLEIN S; FRIEDLAND RP;
Indirizzi:
CASE WESTERN RESERVE UNIV,DEPT NEUROL,11100 EUCLID AVE CLEVELAND OH 44106 CASE WESTERN RESERVE UNIV,UNIV HOSP CLEVELAND,DEPT NEUROL,LAB NEUROGERIATR CLEVELAND OH 44106 CASE WESTERN RESERVE UNIV,UNIV HOSP CLEVELAND,DEPT RADIOL CLEVELAND OH 44106 CASE WESTERN RESERVE UNIV,UNIV HOSP CLEVELAND,DEPT PSYCHOL CLEVELAND OH 44106 ST LUKES HOSP,DEPT MED,DIV NEUROL CLEVELAND OH 00000
Titolo Testata:
American journal of neuroradiology
fascicolo: 5, volume: 19, anno: 1998,
pagine: 853 - 857
SICI:
0195-6108(1998)19:5<853:SAESAP>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
CEREBRAL BLOOD-FLOW; POSITRON-EMISSION TOMOGRAPHY; SENSORY STIMULATION; COGNITIVE ACTIVITY; ACTIVATION; EPILEPSY; REST; AREAS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
31
Recensione:
Indirizzi per estratti:
Citazione:
P. Hedera et al., "SEX AND ELECTROENCEPHALOGRAPHIC SYNCHRONIZATION AFTER PHOTIC-STIMULATION PREDICT SIGNAL CHANGES IN THE VISUAL-CORTEX ON FUNCTIONAL MR-IMAGES", American journal of neuroradiology, 19(5), 1998, pp. 853-857

Abstract

PURPOSE: We evaluated factors that influence MR signal changes duringphotic stimulation of the visual cortex. We also tested the hypothesis that functional MR imaging response corresponds to electroencephalographic (EEG) synchronization after photic stimulation. METHODS: Thirty-eight healthy subjects, 20 men and 18 women, underwent photic stimulation of the visual cortex. They were studied with a 1.5-T MR unit, andphotic stimulation was induced via 8-Hz LED goggles. Seven subjects with and seven without detectable functional MR imaging response to photic stimulation underwent further studies with 16-channel EEG after 2-to 30-Hz stroboscopic stimulation. RESULTS: Thirteen men and 18 womenhad a significant increase in MR signal in the visual cortex; seven men showed no visual cortex activation during more than two repeated studies. Six of seven volunteers with increased functional MR imaging signal after photic stimulation also showed signs of EEG synchronizationwhen an 8-Hz stroboscopic flash was used; six of seven subjects with no functional MR imaging lacked EEG synchronization at 8-Hz stimulation. CONCLUSIONS: Men were more likely than women to have undetectable MR signal changes after photic stimulation. This finding should be considered when interpreting results of functional MR imaging studies. EEGwith stroboscopic examination is a good predictor of functional MR imaging sensitivity to changes in regional cerebral blood flow induced by sensory stimulation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/11/20 alle ore 12:28:00