Bonhoeffer van der Pol model Biophysical journal 1 6 1961 Jul 19431309 Impulses and Physiological States in Theoretical Models of Nerve Membrane 445 466 Richard Fitzhugh Yoshiyuki Asai The Center for Advanced Medical Engineering and Informatics, Osaka University 1-1 Suita, Osaka, Japan 2009-11-25T04:03:20+09:00 2009-11-25T04:03:20+09:00 0.001 dimensionless metre kilogram second ampere kelvin mole candela meter gram milli_second BVP excitation Iext Stimulation from external source y_i Refractoriness of the ipsilateral side x Output excitation level of this BVP shape x x 0.2 time x c x x x x 3.0 y_i Iext c c 1.75 Iext y_i BVP refractoriness x_i Excitation level of the ipsilateral side y Output refractoriness of this BVP shape y y 0.2 time y x_i b y a c c c 1.75 a a 0.7 b b 0.675 x_i current_pulse_generator_membrane current The current value changes from an initial value (parameter: initial_ampere) to another value (parameter: pulse_height) at a given onset time (parameter: pulse_onset_time) and after the pulse_width return to the initial value. shape pulse_onset_time pulse_onset_time 20 The time instance when the pulse takes place. pulse_width pulse_width 40 The pulse width in milli-second. pulse_height pulse_height 0.7 The pulse height. initial_current initial_current 0 The initial value of the stimulus current. stimulus_current pulse_onset_time time time pulse_onset_time pulse_width stimulus_current initial_current pulse_height stimulus_current initial_current The current value changes from an initial value (parameter: initial_ampere) to another value (parameter: pulse_height) at a given onset time (parameter: pulse_onset_time) and after the pulse_width return to the initial value. capsule_of_BVP refractoriness 0.001 port_1 capsule_of_current_pulse_generator_membrane 0.001 port_1 in-ports forwarding out-ports forwarding