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Prog Neuropsychopharmacol Biol Psychiatry. 2006 Jul;30(5):910-3. Epub 2006 Mar 6.

Developmental reflexes and 31P Magnetic Resonance Spectroscopy of basal ganglia in antipsychotic-naive schizophrenia.

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Department of Psychiatry, National Institute of Mental Health and Neurosciences, Hosur road, Bangalore 560029, India.


The study examined the high energy-phosphate metabolism of basal ganglia in antipsychotic-naive schizophrenia patients with and without developmental reflexes in comparison to healthy subjects. Nineteen antipsychotic-naive schizophrenics of whom 11 had developmental reflexes and 26 age-sex-matched healthy subjects without developmental reflexes underwent in-vivo 2-D 31P Magnetic Resonance Spectroscopy of basal ganglia on a 1.5-T scanner. Mean age-at-onset of psychosis was significantly lower in patients with developmental reflexes. Mean PCr/Total ATP ratio in bilateral basal ganglia was lower in patients than healthy subjects. The ratio was the least in patients with developmental reflexes (F=10.7; df=2, 42; p<0.001). Schizophrenia patients with developmental reflexes had the lowest PCr/Total ATP ratio in basal ganglia indicating more severe metabolic abnormality. These patients had younger age-at-onset of psychosis. Together, this suggests neurodevelopmental etiopathogenesis in schizophrenia.

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