Figure 4.

Action potential firing is not altered by Controlled cortical impact (CCI). (A) Representative whole‐cell current‐clamp recording in response to a series of 50 mseconds injection (5 pA steps). Bar charts of average values for control or CCI. Rheobase was calculated as the minimum current that produced an action potential. Threshold was measured at the greatest change in calculated slope. (B) Current‐clamp single action potential step (2 nA, 0.5 mseconds) was injected to measure action potential properties. No statistical difference was found for action potential threshold (P = 0.51), amplitude (P = 0.33), or half‐width (P = 0.80).