Schizophrenia Clinical Trial
Official title:
Analysis of the Effects of Cognitive Remediation Therapy on Schizophrenia Patients Through fMRI Techniques
Cognitive Remediation Therapy (CRT) can enhance cognitive performance in patients with schizophrenia improving clinical outcome. However, the neurobiological mechanism underlying cognitive improvement is not well understood. The aim of this study is to investigate functional connectivity patterns before and after the neurocognitive rehabilitation therapy, especially in fronto-temporal circuitry.
A controlled randomized study will be carry out with three different groups: patients
receiving cognitive rehabilitation treatment (CRT), patients receiving another psychological
intervention of control and a healthy control group. A descriptive study of cases will be
also carried out. The functional MRI (fRMI) techniques as well as voxel-based morphometry
allow individual analysis of cases.
The independent variable is the cognitive rehabilitation treatment. The CRT will be applied
according to the manual of Wykes & Reeder (2005) Cognitive Remediation Therapy: Theory and
Practice, Ed: Routledge. The program has a duration of 40 sessions (one hour of duration),
with two sessions for week during four months. It is carried out individually and utilizes
paper and pencil tasks. The main technique utilized is the scaffolding (to provide
strategies when the patient cannot carry out the task and to withdraw him when he is yet
able of doing it alone) in a context of learning without errors.
The main dependent variable is the functional connectivity cerebral pattern obtained by
means of functional magnetic resonance. Other secondary dependent variables are
neurocognitive functioning, the symptomatic pattern and the psychosocial functioning
obtained from the psychometric evaluation.
All the participants will be evaluated before and after the experimental intervention in
neurocognitive areas (Battery will be composed by WAIS-III, RAVLT, Trail Making Test, STROOP
color word, WCST, FAS-COWAT), symptomatic area (PANSS) and in social functioning (Social
Functioning Scale SFS; Birchwood et al. 1990). The evaluations will be carried out by expert
evaluators that will be blind to the experimental distribution. The statistics results
analysis will be carry out by means of the statistical package SPSS 15.
;
Allocation: Randomized, Intervention Model: Factorial Assignment, Masking: Single Blind (Outcomes Assessor), Primary Purpose: Treatment
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