Long-term abstinence syndrome in heroin addicts: indices of P300 alterations associated with a short memory task.
Prog Neuropsychopharmacol Biol Psychiatry
; 28(7): 1109-15, 2004 Nov.
Article
em En
| MEDLINE
| ID: mdl-15610923
ABSTRACT
Attentional deficits have been implicated in the pathophysiology of opioid addicts. The P300 component of event-related potentials (ERPs) is considered as a manifestation of attentional operations. The authors' goal was the comparison of P300 elicited during a short memory test between subjects with prolonged heroin abstinence and current heroin users as well as healthy controls. The P300 component was evaluated during the anticipatory period of a short memory task in 20 patients characterized by a past history of opioid dependence (6 months abstinence), in 18 current heroin users and in 20 healthy comparison subjects, matched for age, sex and educational level. Abstinent heroin addicts exhibited significant reduction of P300 amplitude at central frontal region, relative to the other two groups. The findings are discussed in connection to the aim of identifying psychophysiological indices, addressing issues in opioid use disorders, and suggest that knowledge about cognitive operations, such as those reflected by P300 component, could provide further insight into psychophysiological mechanisms underlying the long-term abstinence state of heroin addicts.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Síndrome de Abstinência a Substâncias
/
Potenciais Evocados P300
/
Heroína
/
Dependência de Heroína
/
Memória de Curto Prazo
/
Entorpecentes
Tipo de estudo:
Prognostic_studies
/
Risk_factors_studies
Limite:
Adult
/
Female
/
Humans
/
Male
Idioma:
En
Ano de publicação:
2004
Tipo de documento:
Article