Italian physician L Galvani demonstrated the relationship between electricity and muscle contraction that occurs in the electric fluid carried to the muscles by the nerves. He coined the term animal electricity to describe the muscle-activating force. One hundred and fifty years after he determined that muscle activation is generated by an electric fluid carried by the nerves, mathematician N. Wiener studied an artificial hand controlled by an electrical current produced in the muscles. This book discusses new developments, procedures and applications of electromyography.