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Responses of (a) the HH (1952d) model and (b) the revised model to an 80 ms duration current pulse of amplitude 10 μA cm−2 in each case. Similar results are obtained in the HH model for a wide range of pulse amplitudes (Rinzel 1978). A single spike is obtained in the revised model for the suprathreshold stimuli for pulse amplitudes up to 50 μA cm−2 (simulations not shown).
