Abstract
The purpose of this study was to examine neurological soft signs (NSS) in schizophrenic patients with obsessive-compulsive disorder (OCD). Neurological soft signs were assessed in 15 schizophrenic patients with OCD (OCD-schizophrenia), 38 schizophrenia patients without OCD (non-OCD-schizophrenia), and 24 healthy controls (HC) by means of the Neurological Evaluation Scale (NES). The OCD-schizophrenia group had significantly higher scores on total and subscales of 'sensory integration' and 'others' of NES than the HC group. Subscale scores of 'sequencing of motor acts' in-non-OCD-schizophrenia patients were significantly higher compared to OCD-schizophrenia patients. Total NES scores of both groups were significantly correlated with Scale for the Assessment of Negative Symptoms (SANS) scores. Only the subscale of 'sequencing of motor acts' was significantly correlated with SANS within the OCD-schizophrenia group. These results suggest that NSS do not significantly differ between schizophrenia patients with and without OCD, contrary to expectations. The NES scores in OCD-schizophrenic patients do not appear to be related to a more severe form of schizophrenia. Neurological signs and negative symptoms in schizophrenia patients with and without OCD may be considered as neurodevelopmental predisposing factors. Further research is required in schizophrenia patients with OCD to investigate the relationships between NSS and several neuroimaging or neuropsychological findings, constituting a subgroup within the schizophrenia spectrum.
Published Version
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