Revista do Hospital das Clínicas
versão On-line ISSN 1678-9903
SANCHES, Rafael Faria et al. Proton magnetic resonance spectroscopy of the frontal lobe in schizophrenics: a critical review of the methodology. Rev. Hosp. Clin. [online]. 2004, vol.59, n.3, pp. 145-152. ISSN 1678-9903. http://dx.doi.org/10.1590/S0041-87812004000300010.
Schizophrenic patients undergoing proton magnetic resonance spectroscopy show alterations in N-acetyl aspartate levels in several brain regions, indicating neuronal dysfunction. The present review focuses on the main proton magnetic resonance spectroscopy studies in the frontal lobe of schizophrenics. A MEDLINE search, from 1991 to March 2004, was carried out using the key-words spectroscopy and schizophrenia and proton and frontal. In addition, articles cited in the reference list of the studies obtained through MEDLINE were included. As a result, 27 articles were selected. The results were inconsistent, 19 papers reporting changes in the N-acetyl aspartate levels, while 8 reported no change. Methodological analysis led to the conclusion that the discrepancy may be due the following factors: (i) number of participants; (ii) variation in the clinical and demographic characteristics of the groups; (iii) little standardization of the acquisition parameters of spectroscopy. Overall, studies that fulfill strict methodological criteria show N-acetyl aspartate decrease in the frontal lobe of male schizophrenics.
Palavras-chave : Spectroscopy; Proton; Frontal; Schizophrenia; Review.