SPATIAL SUMMATION By N., Pam M.S. - April 13, 2013 Spatial summation is a neural impulse propagated by 2 or more post synaptic potentials that occur at the same time at different synapses on the one neuron. Compare temporal summation. SPATIAL SUMMATION: "In spatial summation, one synapse discharge is not sufficient." Related Psychology Terms GRADED POTENTIAL SENSORY SUMMATION NEUROTRANSMISSION EXCITATORY POSTSYNAPTIC POTENTIAL (EPSP) EXCITATORY SYNAPSE NEUROMUSCULAR JUNCTION ALGEBRAIC SUMMATION SYNAPTIC VESICLE TEMPORAL SUMMATION POSTSYNAPTIC POTENTIAL (PSP) Cite this page: N., Pam M.S., "SPATIAL SUMMATION," in PsychologyDictionary.org, April 13, 2013, https://psychologydictionary.org/spatial-summation/ (accessed March 3, 2020).