Metabolic correlatives of brain activity in a FOS epilepsy patient

Stefano Peca, Marco Carnì, Carlo Di Bonaventura, Teresa Aprile, Gisela E. Hagberg, Anna Teresa Giallonardo, Mario Manfredi, Silvia Mangia, Girolamo Garreffa, Bruno Maraviglia, Federico Giove

Research output: Contribution to journalArticlepeer-review

Abstract

The correlation and the interactions between neuronal activity and underlying metabolic dynamics are still a matter of debate, especially in pathological conditions. This study reports findings obtained on a subject suffering from fixation-off sensitivity (FOS) epilepsy, exploited as a model system of triggerable anomalous electrical activity. Functional Magnetic Resonance Spectroscopy was used to investigate the metabolic response to visual spike-inducing stimuli in a single voxel placed in the temporo-occipital lobe of a FOS epilepsy patient. MRS measurements were additionally performed on a control group of five healthy volunteers. The FOS patient also underwent an EEG session with the same stimulus paradigm. Uniquely in the FOS patient, glutamate and glutamine concentration increased during the first 10 min of stimulation and then returned to baseline. On the other hand, FOS-induced epileptic activity (spiking) endured throughout all the stimulation epoch. The observed metabolic dynamics may be likely linked to a complex interplay between alterations of the metabolic pathways of glutamate and modulation of the neuronal activity.

Original languageEnglish
Pages (from-to)170-178
Number of pages9
JournalNMR in Biomedicine
Volume23
Issue number2
DOIs
Publication statusPublished - Feb 2010

Keywords

  • EEG
  • Epilepsy
  • Fixation-off sensitivity
  • Functional magnetic resonance spectroscopy
  • Glutamate
  • Glutamine

ASJC Scopus subject areas

  • Spectroscopy
  • Molecular Medicine
  • Radiology Nuclear Medicine and imaging

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