A single EPSP cannot induce an action potential
•EPSPs must summate temporally or spatially to induce an action potential
•Temporal summation – presynaptic neurons transmit impulses in rapid-fire order
•Spatial summation – postsynaptic neuron is stimulated by a large number of terminals at the same time
•IPSPs can also summate with EPSPs, canceling each other out
Summation