Proton Magnetic Resonance Spectroscopy (1H MRS) of the Hippocampal Formation in Schizophrenia: A Pilot Study

1994 ◽  
Vol 165 (4) ◽  
pp. 481-485 ◽  
Author(s):  
Henry A. Nasrallah ◽  
Thomas E. Skinner ◽  
Petra Schmalbrock ◽  
Pierre-Marle Robitaille
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Proton Magnetic Resonance ◽  
Proton Magnetic Resonance Spectroscopy ◽  
Hippocampal Formation ◽  
Resonance Spectroscopy ◽  
Temporal Region ◽  
Post Mortem ◽  
Temporal Structures ◽  
The Right

BackgroundRecent post-mortem and magnetic resonance imaging (MRI) studies strongly suggest a decrease in the volume of the hippocampus and other limbic temporal structures in schizophrenia. Therefore, we hypothesised that N-acetyl aspartate (NAA) which is found mainly in neurons and which can be measured by proton magnetic resonance spectroscopy (1H MRS) would be decreased in the limbic temporal region in schizophrenia.MethodConsenting subjects fulfilling DSM-III-R criteria for schizophrenia (n = 11) and matched healthy volunteers (n = 11) who were recruited in a tertiary university referral centre, participated in a 1H MRS brain study. Proton MRS spectra were obtained from a 12 cm3 voxel (2 × 2 × 3 cm) in the right and left hippocampus/amygdala region. A researcher blind to the source of the spectra, measured the NAA intensity in all subjects, which were then statistically compared across the two groups.ResultsNAA intensities were significantly reduced in the right hippocampus/amygdala region of schizophrenic patients (P = 0.038). The difference of the left side did not reach significance at the 95% confidence level.ConclusionsThe findings of decreased NAA in this study suggest that there may be a decrement in neuronal number or tissue volume of the right hippocampal/amygdala region in schizophrenia. Biochemical alterations in the metabolism of NAA in schizophrenia may be an alternative explanation. The findings are consistent with other types of post-mortem and in vivo evidence for hypoplasia of the limbic temporal structures in schizophrenia, postulated to be of neurodevelopmental pathogenesis.

scholarly journals Association between altered proton magnetic resonance spectroscopy (1H MRS) findings and clinical symptoms of schizophrenia.

2013 ◽  
Vol 74 (1) ◽  
pp. 183-190
Author(s):  
Senair Alberto Ambros ◽  
Paulo Belmonte Abreu ◽  
Eloísa Elena Ferreira ◽  
Pdro Eugenio Ferreira ◽  
Luciana Estacia Ambros
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Proton Magnetic Resonance ◽  
Proton Magnetic Resonance Spectroscopy ◽  
Clinical Symptoms ◽  
Resonance Spectroscopy ◽  
Thalamic Nuclei ◽  
1H Mrs ◽  
Disorganized Speech ◽  
The Right

Objective: To assess the metabolic alterations of the thalamus in subjects with schizophrenia compared to healthysubjects and to investigate whether specific schizophrenic symptoms are associated with metabolic alterationsmeasured by 1H MRS. Methods: This is a case-control study including patients with schizophrenia diagnosed usingthe Diagnostic and Statistical Manual of Mental Disorders - Fourth Edition, DMS-IV and the Operational CriteriaChecklist for Psychotic Illness (OPCRIT). Proton magnetic resonance spectroscopy (1H MRS) was used to assessmetabolite concentrations (N-acetylaspartate, choline, creatinine, myoionositol and lactacte) in the left and rightthalamus of 13 patients with schizophrenia and 13 healthy controls. Results: In this study, concentrations ofspecific metabolites in the thalamus, determined by 1H MRS, were similar for individuals with schizophrenia andcontrols. It was observed that cases with family history of schizophrenia and disorganized speech demonstrated areduction in the ratio of the metabolites NAA /Cho in the thalamic nuclei on the right side. However, those withorganized delusions, hallucinations and non-affective auditory hallucinations had an increase of metabolites on theright side compared to the left thalamus. Decreased thalamic metabolic activity in patients with positive symptomswas observed in contrast with those who had well-organized delusions and auditory non-affective hallucinations,core symptoms of schizophrenia. Conclusion: A lateralized thalamic involvement was verified, suggesting thatorganic and genetic factors compromise the right thalamus and that the disorganization associated with delusionsand hallucinations compromises the left thalamic nuclei. Further studies to investigate the correlation betweensymptoms and thalamic dysfunction are warranted. (Rev Neuropsiquiatr 2011;74:183-190)

scholarly journals Use of Magnetic Resonance Spectroscopy to Explore Metacognitive Ability and Academic Performance

2021 ◽  
Author(s):  
Xueyan Zhang ◽  
Jun Li ◽  
Duolao Wang ◽  
Xiaomei Li
Keyword(s):  
Academic Performance ◽  
Prefrontal Cortex ◽  
Nursing Students ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Proton Magnetic Resonance ◽  
Proton Magnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
The Right ◽  
Metacognitive Ability

Abstract Previous studies have reported the importance of the precuneus in mediating metacognition and the prefrontal cortex in decision-making tasks. However, the mechanisms underlying metacognition remain to be fully elucidated. Long echo time proton magnetic resonance spectroscopy (MRS) was used to further explore the neurocognitive correlates of metacognition. Metacognition was based on a self-reported questionnaire of nursing students. MR spectra of the bilateral precuneus and medial prefrontal cortex were recorded. Significant positive correlation was discovered between the total metacognitive score and academic performance (p = 0.007). The precuneus N-acetyl aspartate/creatine + phosphocreatine (NAA/Cr + PCr) ratios corresponded to metacognitive ability. Moreover, the correlation between precuneus NAA/Cr + PCr ratios and metacognitive ability was established for the right and not for the left precuneus. Linear regression suggested that for every increase in the right precuneus NAA/Cr + PCr ratio, there is a predicted decrease in the total metacognitive score (p = 0.020). These findings further indicated that the right precuneal region plays an important role in metacognition and learning.

scholarly journals Metabolic changes in the brain in children with cognitive epileptiform disintegration revealed by proton magnetic resonance spectroscopy

2021 ◽  
Vol 12 (2) ◽  
pp. 36-40
Author(s):  
А. М. Sergeev ◽  
A. V. Pozdnyakov ◽  
E. E. Atamanova ◽  
O. F. Pozdnyakova ◽  
D. A. Malekov ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Concentration Ratio ◽  
Proton Magnetic Resonance ◽  
Proton Magnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Temporal Lobes ◽  
History Of ◽  
The Right ◽  
The Brain

Introduction. Cognitive epileptiform disintegration is a complex of disorders of higher mental functions in a person with a pathological EEG pattern characteristic of epilepsy. In this case, the patient should not have epileptic seizures or a history of single seizures is allowed. The study of biomarkers of the pathological condition under consideration using proton magnetic resonance spectroscopy as indicators that can be objectively evaluated and measured determines the practical relevance of this work.The aim of the study was to determine the diagnostic significance of the metabolites of N-acetylaspartate, choline and creatine according to proton magnetic resonance spectroscopy in the brain of children with cognitive epileptiform disintegration. Material and methods. Using routine MRI and proton magnetic resonance spectroscopy, 6 children with a diagnosis of mental retardation, cognitive epileptiform disintegration at the age of 2 to 7 years (5 boys; 1 girl) were examined. The patients underwent EEG followed by identification of a typical QED pattern. All children had no history of seizures characteristic of epilepsy. Results. А decrease in the ratio of the concentration of NAA/Cr (p<0,05) in the temporal lobes on both sides and the hippocampus on the right was revealed, due to a decrease in the concentration of N-acetylaspartate. There is also an increase in the Cho/NAA concentration ratio (p<0,05) in the hippocampus on the right, and an increase in the Cho/Cr concentration ratio (p<0,05) in the prefrontal cortex, postcentral gyri on both sides, the temporal lobe on the right and the region of the inner capsule on the left, by increasing the concentration of choline. Conclusions. Тhe obtained data suggest that changes in neurometabolism in the cholinergic system in children with cognitive epileptiform disintegration are possibly caused by damage to neuronal connections, mainly in the hippocampus and temporal lobes.

scholarly journals Imaging intelligence with proton magnetic resonance spectroscopy

Intelligence ◽  
2009 ◽  
Vol 37 (2) ◽  
pp. 192-198 ◽  
Author(s):  
Rex E. Jung ◽  
Charles Gasparovic ◽  
Robert S. Chavez ◽  
Arvind Caprihan ◽  
Ranee Barrow ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Proton Magnetic Resonance ◽  
Proton Magnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy

Disulfiram Determination by Proton Magnetic Resonance Spectroscopy and by Colorimetry

1973 ◽  
Vol 56 (1) ◽  
pp. 124-127 ◽  
Author(s):  
Eric B Sheinin ◽  
Walter R Benson ◽  
Myron M Smith
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Proton Magnetic Resonance ◽  
Proton Magnetic Resonance Spectroscopy ◽  
Colorimetric Method ◽  
Drug Substance ◽  
Resonance Spectroscopy ◽  
Pmr Spectroscopy ◽  
Label Claim ◽  
Tablet Excipients

Abstract Disulfiram was determined in disulfiram drug substance and tablets by proton magnetic resonance (PMR) spectroscopy at the 100–480 mg level and by a colorimetric technique involving cuprous iodide at the 50 mg level. The tablet excipients do not interfere in the analysis. The average result for disulfiram in a tablet composite was 100.8±1.4% of label claim by PMR and 100.7±0.4% by the colorimetric method.

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