What would happen if instead of recieving synaptic input from the dedrites which then moves the neural impulse through the soma to the axon then depolarizing through the sodium potasium pump moving out through the synapses. What if the signal then moved backwards? I know you cannot recieve information into the synapse because they are created to send signals just as the dendrites to recieve. But is this solely because of the way in which the signal moves or would it never be possible for the roles to switch if the action potenital switched its movement from positive to negative insted of neg to pos.
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I don't know if this answers your question (its a bit difficult to read) but action potentials (APs) cannot travel backwards because of a refractory period during with threshold (the membrane potential required to initiate an AP) becomes infinite due to the inactivation of sodium channels in the membrane. If you could reach threshold at the axon terminal, instead of having an AP travel down the axon, that could signal vesicle release of neurotransmitters from that axon terminal into the synapse. An AP could then propagate in the opposite direction, but it wouldn't do much good because there's nothing to signal at the cell body of the neuron.
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What is "Reggin" backwards?