SPATIAL SUMMATION By N., Sam M.S. - 77 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 SHERRINGTON, CHARLES SCOTT(1857-1952) SENSORY SUMMATION GRADED POTENTIAL APRAXIA (literally, “inability to act or do”) EXCITATORY SYNAPSE HEAD INJURY (CHRONIC TRAUMATIC DISORDERS) NEUROMUSCULAR JUNCTION NEUROTRANSMISSION CHOLINERGIC POSTSYNAPTIC POTENTIAL (PSP) Cite this page: N., Sam M.S., "SPATIAL SUMMATION," in PsychologyDictionary.org, April 13, 2013, https://psychologydictionary.org/spatial-summation/ (accessed June 29, 2022).