unconditioned stimulus

https://doi.org/10.1351/goldbook.12096
Stimulus that automatically elicits a paired response, such as food eliciting salivation in a hungry animal.
Compare: conditioned stimulus
Source:
PAC, 2015, 87, 841. (IUPAC Glossary of terms used in neurotoxicology (IUPAC Recommendations 2015)) on page 907 [Terms] [Paper]
Citation: 'unconditioned stimulus' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.12096 RIS BibTex EndNote
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