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Titolo:
Magnetoencephalography: Applications in psychiatry
Autore:
Reite, M; Teale, P; Rojas, DC;
Indirizzi:
UnivCOolorado, Hlth Sci Ctr, Dept Psychiat, Biomagnet Imaging Lab, Denver,Univ Colorado Denver CO USA 80262 sychiat, Biomagnet Imaging Lab, Denver,
Titolo Testata:
BIOLOGICAL PSYCHIATRY
fascicolo: 12, volume: 45, anno: 1999,
pagine: 1553 - 1563
SICI:
0006-3223(19990615)45:12<1553:MAIP>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN AUDITORY-CORTEX; EVOKED MAGNETIC-FIELDS; INTER-HEMISPHERIC ASYMMETRY; HUMAN-BRAIN; TONOTOPIC ORGANIZATION; SOURCE LOCATION; SENSORY MEMORY; SCHIZOPHRENIC-PATIENTS; NEUROMAGNETIC EVIDENCE; LOCALIZATION ACCURACY;
Keywords:
magnetoencephalography; electroencephalography; schizophrenia; auditory evoked fields; somatosensory evoked fields; magnetic source imaging; bipolar disorder; schizoaffective disorder; psychoses;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
81
Recensione:
Indirizzi per estratti:
Indirizzo: Reite, M Univ-68,4200o, Hlth Sci Ctr, Dept Psychiat, Biomagnet Imaging Lab, Box C268 Univ Colorado Box C268-68,4200 E 9th Ave Denver CO USA 80262 C268
Citazione:
M. Reite et al., "Magnetoencephalography: Applications in psychiatry", BIOL PSYCHI, 45(12), 1999, pp. 1553-1563

Abstract

Magnetoencephalography (MEG) measures the extracranial magnetic fields produced by intraneuronal ionic current flow within appropriately oriented cortical pyramidal cells. Based upon superconducting quantum interference device technology operating at liquid helium temperatures (4 K), MEG offers excellent temporal and spatial resolution for selected sources, and complements information obtained from electroencephalograms and other functional imaging strategies, Current instrumentation permits recording up to several hundred channels simultaneously with head-shaped dewars, although the cast of such systems is high. The fact that magnetic fields fall off with the square of the distance from the source is both a benefit (when separating activity in the two hemispheres) and a limitation (when attempting to record deepsources). The lack of skin contact facilitates using MEG to record direct current and very high frequency (>600 Hz) brain activity. The clinical utility of MEG includes presurgical mapping of sensory cortical areas and localization of epileptiform abnormalities, and localization of areas of brain hypoperfusion in stroke patients. MEG studies in psychiatric disorders have contributed materially to improved understanding of anomalous brain lateralization in the psychoses, have suggested that P50 abnormalities may reflectaltered gamma band activity, and have provided evidence of hemisphere-specific abnormalities of short-term auditory memory function.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/01/20 alle ore 18:58:49