(a) Capacitance is similar between control and YOPD. (b) No difference in resting membrane potential (RMP) is observed. (c) Voltage-gated sodium current density is decreased in YOPD compared to control. No difference is observed in either the (d) inwards rectifying potassium current density, or (e) delayed rectifier potassium current density. * denotes significance p = 0.018 two tailed t-test with Welch’s correction. Bar graphs represent mean, error bars represent standard deviation (s.d.).