W.B. Carpenter discovered the phenomenon that by the mere imagination of movements exactly these can be triggered involuntarily. Involuntary means without will. Thus, the Carpenter effect is also called ideomotor law. This means that the mere idea, for example "I clench a fist," generates electrical potentials and the movement is executed. This effect has been proven neuroscientifically. In hypnosis, the Carpenter Effect is thought to go beyond the internal imitation of movements. Thus, feelings, thoughts and views are also involved.