Objective: Studies of Neurological Soft Signs (NSS) in schizophrenia are confounded by handedness, inconsistent methodology, and prior treatment with neuroleptics. The study objective is to examine NSS in never-treated schizophrenia.
Method: We examined the NSS in treatment-naïve schizophrenia patients (n = 21) and age, sex, education, and handedness matched normal controls (n = 21) using the modified Neurological Evaluation Scale with good inter-rater reliability.
Results: Schizophrenia patients had significantly more NSS than normals. No significant correlation was found between illness duration and NSS.
Conclusion: Higher neurological signs in never-treated patients and their lack of association with illness duration suggest neurodevelopmental etiopathogenesis of schizophrenia.
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