Based on high overlap of sensorimotor rhythm (12–15 Hz) with high-frequency alpha band activity as well as the strong correlation between high-frequency alpha band and cognitive performance improvement, Hanslmayr et al. supposed that the efficacy of NF on increasing sensorimotor rhythm protocol is due to the enhanced power of high-frequency alpha band . They designed a protocol and observed that the enhanced power of high-frequency alpha and the suppressed theta band will result in improvement of memory performance in healthy people .