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Home Q & A Board Biology-Related Homework Help General Biology
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13 years ago
Describe temporal summation, and explain the difference between temporal summation in a neuron and temporal summation in muscle.
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13 years ago
Temporal summation is the addition of either voltages or contraction forces at one location that occur close to each other in time. In a neuron, temporal summation of PSPs results in a total potential that may or may not bring the membrane potential to the action potential threshold. In a muscle, temporal summation of twitches results in greater contraction force than a single twitch, and if the stimulus frequency is high enough, a sustained contraction with no relaxation is produced.
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13 years ago Edited: 13 years ago, lind
Temporal summation occurs when two or more action potentials (nerve impulses) arrive in rapid succession along a single pre-synaptic neurone
Temporal summation is produced by stimulating the muscle rapidly enough so that one contraction is not finished before another begins
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