


Volume 20 No 20 (2022)
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The Effect of transcranial Direct Current Stimulation (tDCS) on the Reduction of Negative Symptoms in Schizophrenic Patients in Ahvaz Golestan Hospital
Forough Riahi , Maryam Pourshams , Ashraf Tashakori, Saeed Mohammad Hassani
Abstract
Background: Schizophrenia is one of the chronic psychiatric disorders that positive and negative symptoms,
particularly negative ones, causes reducing performance in personal, social, and family performances. The
aim of this study was to evaluate the effect of transcranial direct current stimulation (tDCS) on reducing the
negative symptoms of patients with schizophrenia.
Methods: In this double-blind clinical trial study, 30 patients with schizophrenia were admitted according to
the DSM-V criteria and divided into two equal groups. On the first group (case), two mill amperes of
transcranial direct current stimulation were applied bilaterally in weeks 0, 4 and 8 for 20 minutes in each
session. The second group (control) was stimulated by sham. Then, after 4 and 8 weeks, the two groups were
compared in terms of negative symptoms and the overall score of the Positive and Negative Syndrome Scale
(PANSS).
Keywords
Schizophrenia, transcranial direct current stimulation (tDCS), Negative symptoms, PANSS
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