Investigating The Ability Of Conditioned Stimulus

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Holland and Hsu (2014) were interested first in investigating the ability of Conditioned stimulus (CSs) and Interruption of stimulus (ISs) to modulated both eating food and working for it. Secondly, the researchers were examining the role of the amygdala central nucleus (CeA) in these modulatory functions FOS expression after a test of CS- or IS-potentiated eating (Experiment 1) and by examining the effects of CeA lesions on the modulation of both feeding and instrumental behavior by CSs or ISs (Experiment 2). In experiment 2, the researchers did a surgery in the rat’s amygdala of which in this paper would not be further discussed. In experiment 1, the researcher’s hypothesis is that it is possible that CeA is importantly involved in the potentiation of feeding and/ or food-rewarded instrumental behavior by an IS. The basic point to support the generation of the hypothesis is that Food-paired cue typically enhances the rate of instrumental lever pressing that earns the food reward. There are two behavioral phenomena being studied in this research. The first phenomenon is Classical conditioning with inhibitory conditioning. Classical conditioning is a process in which a previous stimulus that does not elicit a certain response is associated with a second stimulus that does: as a result, the first neutral stimulus comes to elicit a response. The procedure of classical conditioning involves the unconditioned stimulus (US), the unconditioned response (UR), the conditioned stimulus (CS) and the conditioned response (CR). The US naturally elicits a UR. The UR is the response that is naturally elicited by the US. The US and the UR are unlearned reaction. In contrast, the CS is any stimulus that was initially neutral comes to elicit a re... ... middle of paper ... ... test, designed to access consumption induced by CS, IS, or U. Rats were given 10- min unlimited access to 15 ml sucrose placed in cups attached to the floor of the experiment chamber. After the rats were removed from the chamber, the rats received 14 20- s stimulus presentations, seven of U, and seven either CS or IS, or additional U presentations. Those studies showed that consumption was potentiated during 20- s CS or IS presentations compared to consumption during stimulus- free periods. In the inclusion of U trials permitted attribution of CS- or IS potentiated consumption to the training histories of those stimuli rather than the simple presentation of a stimulus. The measured of potentiated feeding was the difference between the rate of sucrose delivered needed to maintain a constant sucrose with in stimulus presentation and also in the free stimulus periods.

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