Journal article

Seven-tesla quantitative magnetic resonance spectroscopy of glutamate, gamma-aminobutyric acid, and glutathione in the posterior cingulate cortex/precuneus in patients with epilepsy

Ofer M Gonen, Bradford A Moffat, Patricia M Desmond, Elaine Lui, Patrick Kwan, Terence J O'Brien

Epilepsia | WILEY | Published : 2020

Abstract

OBJECTIVE: The posterior cingulate cortex (PCC)/precuneus is a key hub of the default mode network, whose function is known to be altered in epilepsy. Glutamate and γ-aminobutyric acid (GABA) are the main excitatory and inhibitory neurotransmitters in the central nervous system, respectively. Glutathione (GSH) is the most important free radical scavenging compound in the brain. Quantification of these molecules by magnetic resonance spectroscopy (MRS) up to 4 T is limited by overlapping resonances from other molecules. In this study, we used ultra-high-field (7 T) MRS to quantify their concentrations in patients with different epilepsy syndromes. METHODS: Nineteen patients with temporal lobe..

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