Definitions for "Spatial summation"
In synaptic connections, two afferent volleys from adjacent areas within a short time induce a greater response from a postsynaptic cell than either separately.
Summation of postsynaptic responses in a postsynaptic cell from two or more synaptic inputs that are active at about the same time.
In the production or inhibition of action potentials in a postsynaptic neuron, the interaction of depolarizations and hyperpolarizations produced by several terminal boutons.