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- W3198860022 endingPage "111377" @default.
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- W3198860022 abstract "Alterations in levels of neurotransmitters γ-aminobutyric acid (GABA) and glutamate may underlie the mechanism by which repetitive transcranial magnetic stimulation (rTMS) has efficacy as a treatment for major depressive disorder (MDD). This study used proton magnetic resonance spectroscopy (H1MRS) to investigate the effect of rTMS on levels of GABA and combined glutamate/glutamine measure (Glx). Treatment-resistant, currently depressed individuals participated in a naturalistic open-label study with rTMS treatment administered at 10 Hz and 120% of resting motor threshold to the left dorsolateral prefrontal cortex (DLPFC) for 20 sessions. H1 MRS measures were collected at baseline and after four weeks of daily treatment. GABA and Glx were measured from both the left DLPFC and a control region (right motor cortex). Twenty-seven participants completed the study and were included in the analysis. Contrary to previous studies, no difference in GABA was observed following treatment. Glx levels were found to significantly increase in both the left DLPFC and right motor cortex voxels but this increase did not correlate with antidepressant response. Glx levels were found to increase following rTMS, not only underlying the site of stimulation but also at a distant control voxel suggesting a degree of non-specificity in response to therapy." @default.
- W3198860022 created "2021-09-13" @default.
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- W3198860022 date "2021-11-01" @default.
- W3198860022 modified "2023-09-27" @default.
- W3198860022 title "Effect of rTMS on GABA and glutamate levels in treatment-resistant depression: An MR spectroscopy study" @default.
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- W3198860022 doi "https://doi.org/10.1016/j.pscychresns.2021.111377" @default.
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