Numerous theses in our lab have focused on the effects of certain manipulations

Question

Numerous theses in our lab have focused on the effects of certain manipulations (zinc supplementation and stress) on fear conditioning tasks. Here is what we do: o Place the rat into a box with metal bars on the floor o Play a 20-second tone that coterminates (ends at the same time) with a shock through the bars on the floor (the shock and tone occur at the same time) o Do this multiple times o Play the tone alone and note the response in a different context the next day Please answer the following questions regarding this experimental design: What type of fear conditioning does this represent? What structure (specific portion) is vital for the convergence of UCS and CS? What is the process called when I repeatedly present the CS without the UCS? What is the likely response of the rat after being placed in a different context and hearing the CS without the UCS multiple times (x18)?

( its a physiological psychology )

Explanation / Answer

Ques-1: What type of fear conditioning does this represent?

Cued and contextual fear conditioning was observed in this experiment because a foot shock has induced a freezing response "of unconditioned stimulus (US)" whereas a cue has produced conditioned stimulus (CS)

Ques-2: What structure (specific portion) is vital for the convergence of UCS and CS?

Answer: Hippocampus has mainly involved studying the gap between convergence of UCS and CS in the above rodent experiment. Apart from this, other parts such as amygdala, frontal cortex, and cingulate cortex have involved in the study of fear conditioning (zinc supplementation and stress- cue or foot shock induced)

Ques-3: What is the process called when I repeatedly present the CS without the UCS?

Extinction: it is the extinction trail in which a process conditioned stimuli (CS) is presented repeatedly without unconditioned stimuli (UCS) & UCS eventually disappear

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