Relating MEG measured motor cortical oscillations to resting γ-Aminobutyric acid (GABA) concentration

► We observed a significant linear relation between MI GABA concentration and PMBR power. ► We observed a significant linear relation between MI GABA concentration and MRGS Hz. ► We observed a significant negative linear relation between Age and MI Gamma Hz. ► Findings support the role of GABA in generation & modulation of motor cortex rhythms.