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summation

summation
1. (in neurophysiology) The combined effect of the changes in electric potential elicited in one or more postsynaptic membranes by the transmission of impulses at synapses that is sufficient to trigger an action potential in the postsynaptic neuron. Summation occurs when one or a few postsynaptic potentials alone are insufficient to elicit a response in the postsynaptic neuron; it may consist of the effect of two or more potentials evoked simultaneously at different synapses on the same neuron (spatial summation) or in rapid succession at the same synapse (temporal summation).

2. See synergism.

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"summation." A Dictionary of Biology. . Encyclopedia.com. 20 Aug. 2017 <http://www.encyclopedia.com>.

"summation." A Dictionary of Biology. . Encyclopedia.com. (August 20, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/summation-1

"summation." A Dictionary of Biology. . Retrieved August 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/summation-1

summation

sum·ma·tion / səˈmāshən/ • n. 1. the process of adding things together: the summation of numbers of small pieces of evidence. ∎  a sum total of things added together. 2. the process of summing something up: these will need summation in a single document. ∎  a summary. ∎  Law an attorney's closing speech at the conclusion of the giving of evidence. DERIVATIVES: sum·ma·tion·al / -shənl/ adj. sum·ma·tive / ˈsəmətiv/ adj.

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"summation." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 20 Aug. 2017 <http://www.encyclopedia.com>.

"summation." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (August 20, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/summation

"summation." The Oxford Pocket Dictionary of Current English. . Retrieved August 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/summation

summation

summation The addition of stimuli of different kinds, which may be perceived at more than one time (temporal summation) and in more than one place (spatial summation), to produce a co-ordinated response in an animal. Summation is one of the integrating properties of the central nervous system.

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"summation." A Dictionary of Ecology. . Encyclopedia.com. 20 Aug. 2017 <http://www.encyclopedia.com>.

"summation." A Dictionary of Ecology. . Encyclopedia.com. (August 20, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/summation

"summation." A Dictionary of Ecology. . Retrieved August 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/summation

summation

summation The addition of stimuli of different kinds, which may be perceived at more than one time (temporal summation) and in more than one place (spatial summation), to produce a co-ordinated response in an animal. Summation is one of the integrating properties of the central nervous system.

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"summation." A Dictionary of Zoology. . Encyclopedia.com. 20 Aug. 2017 <http://www.encyclopedia.com>.

"summation." A Dictionary of Zoology. . Encyclopedia.com. (August 20, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/summation-0

"summation." A Dictionary of Zoology. . Retrieved August 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/summation-0