"In our society we are constantly being bombarded by foodstimulus," she said in a telephone interview, so understanding the brain's response can help in developing ways to resist that stimulus.
When Pavlov put food powder in the dog's mouth, and saliva was generated. That's an unconditioned stimulus giving rise to an unconditioned response.
巴甫洛夫给狗喂食,狗会分泌唾液。那就是非条件刺激引起了非条件反射。
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Well, when Pavlov, for instance, started before conditioning there was simply an unconditioned stimulus, the food in the mouth, and an unconditioned response, saliva.