Maladaptive anticipatory saccades in schizophrenia.
Biol Psychiatry
; 30(8): 779-94, 1991 Oct 15.
Article
em En
| MEDLINE
| ID: mdl-1751621
ABSTRACT
We compared the saccades made by 8 neuroleptic-treated and 7 drug-free schizophrenic inpatients with those made by 11 normal controls during two eye movement tasks. The first task was designed to elicit visually guided but not internally guided saccades. The second task was designed so that optimal performance required saccades be guided on the basis of an internal representation of target behavior. During the first task, schizophrenics made visually guided saccades that were as accurate as those made by control, but both drug-free and neuroleptic-treated schizophrenics made intrusive saccades at a significantly higher rate than control subjects. Most of these maladaptive saccades appeared to be premature attempts to anticipate target jump. During the second eye movement task, which for optimal performance required use of an internal representation to guide eye movements, most patients learned to anticipate target jump as well as controls. However, neuroleptic-treated patients made significantly smaller adaptive anticipatory saccades than either drug-free schizophrenic patients or normal subjects. These finding are discussed as they relate to the prefrontal cortex-basal ganglia circuits involved in the regulation of behavior by representational knowledge and the idea that the abnormal anticipatory saccades we observed represent a failure in the sensorimotor gating of information derived from internal representations.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Movimentos Sacádicos
/
Atenção
/
Esquizofrenia
/
Psicologia do Esquizofrênico
/
Enquadramento Psicológico
Limite:
Adult
/
Humans
Idioma:
En
Ano de publicação:
1991
Tipo de documento:
Article