 The proposed wireless body sensor network allows for the simultaneous collection of electroencephalography, EEG, and high-density surface electromyography, HDS-EMG, data from multiple locations on the body. It consists of wireless sensor units and synchronization modules, which can be used together or separately depending on the research needs. The sensor units have been tested and compared against a wired benchmark EEG device, showing similar performance in terms of accuracy of synchronization and quality of collected signals. The wireless body sensor network has been validated by performing an in-depth characterization of its components and a head-to-head comparison between it and the wired benchmark EEG device. This article was authored by G. L. Sarone, a John Grandi, M. Gisliari, and others.