About the same time, systematic twin studies of the EEG and ERP phenotypes began in Ravich-Scherbo's Genetic Psychophysiology laboratory in Moscow. These studies, summarized in an edited book titled “Problems of Genetic Psychophysiology of Man” published in 1978 (Lomov and Ravich-Shcherbo, 1978), have demonstrated heritability of resting EEG including spectral band powers, amplitude variability, autoregressive parameters of EEG rhythms, as well as reactive EEG changes in response to sensory stimulation.