Tanult ekvivalencia szkizofréniában: új módszer a hippocampalis és a basalis ganglionokhoz kapcsolódó memóriafunkciók mérésére.

Translated title of the contribution: Learned equivalence in schizophrenia: novel method for the measurement of memory functions of the hippocampus and basal ganglia

Orsolya Nagy, O. Kelemen, Rita Erdélyi, Miklósné Pataki, Z. Janka, Catherine E. Myers, Mark A. Gluck, S. Kéri

Research output: Contribution to journalArticle

Abstract

The purpose of the present study was to investigate basal ganglia (BG) and medial temporal lobe (MTL) dependent learning in patients with schizophrenia. Acquired equivalence is a phenomenon in which prior training to treat two stimuli as equivalent (if two stimuli are associated with the same response) increases generalization between them. The learning of stimulus-response pairs is related to the BG, whereas the MTL system participates in stimulus generalization. Forty-three patients with DSM-IV schizophrenia and 28 matched healthy controls participated in the study. Volunteers received the acquired equivalence associative learning task (FISHES) during which associations between faces and pet fishes are learned. Results revealed that patients with schizophrenia showed a selective deficit on stimulus generalization, whereas stimulus-response learning was unaffected. The number of errors during stimulus-response learning correlated with the daily chlorpromazine-equivalent dose of antipsychotics. In conclusion, patients with schizophrenia showed deficits during MTL-dependent learning, but not during BG-dependent learning. High-dose first generation antipsychotics may disrupt BG-dependent learning by blocking dopaminergic neurotransmission in the nigro-striatal system.

Original languageHungarian
Pages (from-to)363-369
Number of pages7
JournalPsychiatria Hungarica : A Magyar Pszichiátriai Társaság tudományos folyóirata
Volume20
Issue number5
Publication statusPublished - 2005

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Basal Ganglia
Hippocampus
Schizophrenia
Learning
Temporal Lobe
Stimulus Generalization
Antipsychotic Agents
Response Generalization
Corpus Striatum
Pets
Chlorpromazine
Synaptic Transmission
Diagnostic and Statistical Manual of Mental Disorders
Volunteers
Fishes

ASJC Scopus subject areas

  • Psychiatry and Mental health

Cite this

Tanult ekvivalencia szkizofréniában : új módszer a hippocampalis és a basalis ganglionokhoz kapcsolódó memóriafunkciók mérésére. / Nagy, Orsolya; Kelemen, O.; Erdélyi, Rita; Pataki, Miklósné; Janka, Z.; Myers, Catherine E.; Gluck, Mark A.; Kéri, S.

In: Psychiatria Hungarica : A Magyar Pszichiátriai Társaság tudományos folyóirata, Vol. 20, No. 5, 2005, p. 363-369.

Research output: Contribution to journalArticle

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