Biology / Bio 2877 · Atom · ~20 seconds
Stimulus Intensity Encoding
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Sensory systems encode stimulus intensity two ways: a stronger stimulus raises a receptor's action-potential firing rate, and it also recruits more nearby receptors at once.
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A light touch activates few receptors firing slowly; firm pressure activates many receptors firing rapidly.
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Intensity encoding uses rate and recruitment together — neither alone fully explains how the nervous system represents stimulus strength.