EEG spectra in XYY and XXY men

Ten XYY, 13 XXY, and 45 control XY men were located in a birth cohort of tall men (non-institutionalized), and their EEGs were subjected to computer analyses. The XYY men showed a significantly slower alpha activity and more power in the 3.3--9.6 c/sec band than their XY controls. There were no consistent EEG differences between the XXY men and their controls.