title: Programmed stimulator for threshold of action potential.
abstract: A programmed digital stimulator is described, in which the pulse generator can be regulated in frequency and duration. The output pulses amplitude increases automatically by increments under 5% of the previous step, sequence which allows a much better approximation to the threshold value of action potential. A photographic camera is synchronized for recording. The power supplies, pulse duration generator, binary counter, converter, pulse control, and detector circuits are given in detail.
mesh_terms: D000200:Action Potentials; D000818:Animals; D002468:Cell Physiological Phenomena; D003201:Computers; D004558:Electric Stimulation / Q000379:methods*; D006801:Humans; D009132:Muscles / Q000166:cytology / Q000502:physiology*; D013997:Time Factors