Historique
Périodique
Effects of the amazonian psychoactive beverage ayahuasca on binocular rivlary : interhemispheric switching or interhemispheric fusion ?
(Effets de l'ayahuasca, boisson psychotrope amazonienne, sur la rivalité binoculaire : commutation ou fusion entre les deux hémisphères cérébraux ?)
Auteur(s) :
FRECSKA E. ;
WHITE, K. D. ;
LUNA L. E.
Année
2003
Page(s) :
367-374
Langue(s) :
Anglais
Refs biblio. :
46
Domaine :
Drogues illicites / Illicit drugs
Discipline :
PRO (Produits, mode d'action, méthode de dépistage / Substances, action mode, screening methods)
Thésaurus mots-clés
AYAHUASCA
;
CERVEAU
;
VISION
;
OEIL
;
EFFET SECONDAIRE
;
TROUBLES DE LA PERCEPTION
Note générale :
Journal of Psychoactive Drugs, 2003, 35, (3), 367-374
Note de contenu :
fig.
Résumé :
ENGLISH :
An early theoretical analysis supposed changes in hemispheric integration as the basis of altered state of consciousness induced by psychoactive drugs. Brain imaging studies revealed right cortical activation after administration of hallucinogens. Recent studies on binocular rivalry suggest that interhemispheric switching is the neural substrate of the perceptual oscillations observed during dichoptic stimulus presentation. The current study tested perceptual alternation in ceremonial participants, who ingested the South American hallucinogenic beverage ayahuasca, to examine the claim that there might be changes in interhemispheric function under the influence of hallucinogens. Ingestion of ayahuasca resulted in a decrease of rivalry alternation rates, increased length of one percept and there was evidence of phenomenal fusion. The findings are in line with results of brain activation studies and support the concept of interhemispheric fusion in altered states of consciousness. (Editor's abstract.)
Affiliation :
MHC, 2717 NW 103 rd way, Gainesville, FL 32606
Etats-Unis. United States.
Etats-Unis. United States.