Complex sentence: His early research with Hans Helmut Kornhuber in the mid sixties led to the discovery Bereitschaftspotential or readiness potential, which is a measure of neural activity in the brain that precedes voluntary movements-set an important standard in research and rehabilitation of motor control systems.
Split into simpler sentences: His early research with Hans Helmut Kornhuber in the mid sixties led to the discovery of the Bereitschaftspotential (or readiness potential), which is a measure of neural activity in the brain that precedes voluntary movements. This discovery set an important standard in research and rehabilitation of motor control systems.