Dennis K. Pearl

Time of conscious intention to act in relation to onset of cerebral activity (readiness-potential). The unconscious initiation of a freely voluntary act.

Curtis A. Gleason, Benjamin LlBET, Elwood W. Wright, 1983, Brain : a journal of neurology.

Control of the transition from sensory detection to sensory awareness in man by the duration of a thalamic stimulus. The cerebral 'time-on' factor.

David E. Morledge, Nicholas M. Barbaro, Benjamin Libet, 1991, Brain : a journal of neurology.