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Titolo:
Brain electric correlates of strong belief in paranormal phenomena: intracerebral EEG source and regional Omega complexity analyses
Autore:
Pizzagalli, D; Lehmann, D; Gianotti, L; Koenig, T; Tanaka, H; Wackermann, J; Brugger, P;
Indirizzi:
Univ Hosp Psychiat, KEY Inst Brain Mind Res, Zurich, Switzerland Univ HospPsychiat Zurich Switzerland ain Mind Res, Zurich, Switzerland Inst Grenzgebiete Psychol & Psychohyg, Freiburg, Germany Inst GrenzgebietePsychol & Psychohyg Freiburg Germany reiburg, Germany Univ Zurich Hosp, Dept Neurol, CH-8091 Zurich, Switzerland Univ Zurich Hosp Zurich Switzerland CH-8091 CH-8091 Zurich, Switzerland
Titolo Testata:
PSYCHIATRY RESEARCH-NEUROIMAGING
fascicolo: 3, volume: 100, anno: 2000,
pagine: 139 - 154
SICI:
0925-4927(200012)100:3<139:BECOSB>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
RIGHT HEMISPATIAL INATTENTION; PSYCHOSIS-PRONE SUBJECTS; HEMISPHERE FUNCTION; SOURCE LOCALIZATION; FREQUENCY BANDS; AUDITORY HALLUCINATIONS; SCHIZOTYPAL PERSONALITY; PERCEPTUAL ABERRATIONS; COGNITIVE ASYMMETRY; MAGICAL IDEATION;
Keywords:
schizotypy; paranormal belief; interhemispheric differences; EEG frequency analysis; source localization; omega complexity; brain functional states;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
82
Recensione:
Indirizzi per estratti:
Indirizzo: Pizzagalli, D Univ Wisconsin, Dept Psychol, Lab Affect Neurosci, 1202 W Johnson St, Madison, WI 53706 USA Univ Wisconsin 1202 W Johnson St Madison WIUSA 53706 06 USA
Citazione:
D. Pizzagalli et al., "Brain electric correlates of strong belief in paranormal phenomena: intracerebral EEG source and regional Omega complexity analyses", PSYCH RES-N, 100(3), 2000, pp. 139-154

Abstract

The neurocognitive processes underlying the formation and maintenance of paranormal beliefs: are important for understanding schizotypal ideation. Behavioral studies indicated that both schizotypal and paranormal ideation are based on an overreliance on the right hemisphere, whose coarse rather than focussed semantic processing may favor the emergence of 'loose' and 'uncommon' associations. To elucidate the electrophysiological basis of these behavioral observations, 35-channel resting EEG was recorded in pre-screened female strong believers and disbelievers during resting baseline. EEG data were subjected to FFT-Dipole-Approximation analysis, a reference-free frequency-domain dipole source modeling, and Regional (hemispheric) Omega Complexity analysis, a linear approach estimating the complexity of the trajectories of momentary EEG map series in state space. Compared to disbelievers, believers showed: more right-located sources of the beta2 band (18.5-21 Hz, excitatory activity); reduced interhemispheric differences in Omega complexity values; higher scores on the Magical Ideation scale; more general negative affect; and more hypnagogic-like reveries after a 4-min eyes-closed resting period. Thus, subjects differing in their declared paranormal belief displayed different active, cerebral neural populations during resting, task-free conditions. As hypothesized, believers showed relatively higher righthemispheric activation and reduced hemispheric asymmetry of functional complexity. These markers may constitute the neurophysiological basis for paranormal and schizotypal ideation. (C) 2000 Elsevier Science Ireland Ltd. Allrights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 06:05:23