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[Proton magnetic resonance spectroscopy in the evaluation of cognitive disturbances].

Magnetic resonance spectroscopy can detect metabolic changes in the brain, including changes in N-acetyl aspartate, a metabolite generally believed to be a marker of neuronal integrity. The correlations between metabolic changes and cognitive status in normal subjects and in a range of neurological and psychiatric disorders are reviewed. Magnetic resonance spectroscopy seems to be a way to monitor the efficacy of existing and new treatments to prevent the development of cognitive deficits in a number of diseases.