Spectral power content for the mTBI and control groups. Top: mean, whole-brain spectral power content with ±1 standard error bars, showing a minor increase in 4–10 Hz power (arbitrary units) in the mTBI. Bottom: mean spectral power content for the low-frequency 3–15 Hz range, divided by hemisphere and lobe for the mTBI versus control group. Minor alterations in spectral power were found in left and right temporal, subcortical, and parietal regions in the mTBI group.