Research on human motoneurons is conducted through the analysis of single motor unit potential trains. Although human motoneurons have been investigated for years, their firing patterns at high force levels remain largely unexplored. Filling this gap requires selective electrodes, which enable the recording of distinguishable single motor unit potentials even at maximal effort. This review describes the characteristics of various electrodes used in electromyography with special attention paid to electrode selectivity. Those most suitable for this purpose are highlighted.