POSITIVE AFTERPOTENTIAL By N., Pam M.S. - April 7, 2013 a small, positive membrane potential reflected by a neuron or muscle cell while recovering from an ACI ion potential. The muscle or nerve is more arousable during the positive afterpotential. POSITIVE AFTERPOTENTIAL: "The positive afterpotential period is the optimal time to elicit a response." Related Psychology Terms STIMULATION EFFECTS END PLATE ANODAL POLARIZATION NEUROTRANSMITTER NEGATIVE AFTERPOTENTIAL CELL BODY POSTSYNAPTIC RECEPTOR NEUROTRANSMISSION TRANSPORTER ACTIVE TRANSPORT Cite this page: N., Pam M.S., "POSITIVE AFTERPOTENTIAL," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/positive-afterpotential/ (accessed January 23, 2020).