Role of classical conditioning in learning gastrointestinal symptoms

Figure 1 The classical conditioning model of nausea and vomiting. Definition of the unconditioned stimuli (US), the conditioned stimuli (CS), and the unconditioned response (UR), the conditioned response (CR) and their mediation. Description of acquisition (learning) and test.

Figure 2 Central nervous system (CNS) structures and the mediation of nausea and vomiting.

Figure 3 The classcial conditioning model in cancer chemotherapy. CS: conditioned stimulus, US: unconditioned stimulus; UR: unconditioned response; CR: conditioned response.