Auditory signal detection in schizophrenia: Correlates with auditory verbal hallucinations & effect of single session transcranial direct current stimulation (tDCS).
Psychiatry Res
; 297: 113704, 2021 03.
Article
em En
| MEDLINE
| ID: mdl-33453498
ABSTRACT
INTRODUCTION:
Transcranial Direct Current Stimulation (tDCS) has been beneficial for treating auditory verbal hallucinations (AVH) in schizophrenia (SZ). Aberrant auditory signal detection (ASD) is one of the pathogenetic mechanisms for AVH. We investigated the correlates of ASD with AVH and the impact of single-session tDCS on ASD in SZ patients.METHODS:
The ASD performance in SZ patients was compared with matched healthy controls (HC) (N = 24). Subsequently, the effect of single-session tDCS on ASD in SZ patients (N = 24) with AVH was examined in a randomized, double-blind, sham-controlled, cross-over design. The true and sham tDCS were administered (anode at the left dorsolateral prefrontal cortex and cathode at the left temporoparietal junction) on two different days. ASD task was performed before and after each session of tDCS.RESULTS:
Auditory hallucination rating scores correlated significantly with false alarm rate, discriminability index, and response bias. SZ patients had a significantly lesser discriminability index in ASD than HC. Single-session tDCS (true versus sham) did not have any significant effect on ASD in SZ patients.CONCLUSION:
The study findings support the pathogenetic role of ASD in AVH in SZ. Lack of effect on ASD following single-session tDCS suggests the need for multi-session studies in the future.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Esquizofrenia
/
Lobo Temporal
/
Córtex Pré-Frontal
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Estimulação Transcraniana por Corrente Contínua
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Alucinações
Tipo de estudo:
Clinical_trials
/
Diagnostic_studies
Limite:
Adult
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Female
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Humans
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Male
Idioma:
En
Revista:
Psychiatry Res
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
Índia