0.010.020.030.040.050.0-100.0-70.0-40.0-10.020.050.0time (ms)membrane potential (mV)Membrane potential vs time-80.0-56.0-32.0-8.016.040.00.00.10.20.30.40.50.6V (mV)RR vs V0.010.020.030.040.050.00.030.060.090.0120.0150.0time (ms)stimulus (µA/cm²)Stimulus vs time-80.0-58.0-36.0-14.08.030.0-300.0-150.00.0150.0300.0450.0VV'Phase portrait