Extinction + relapse effects

Question 1

Extinction

Answer 1

Unlearning fears, CS without the shock. Slowly extinct fear reaction *need a lot of unpaired repetition

Question 2

Spontaneous recovery

Answer 2

Couple hours after extinction: Small fear reaction

Sign. time after extinction: Spontaneous recovery of fear (wo new experience)

Question 3

Reinstatement effect

Answer 3

Presenting unsignaled shock after extinction: fear is back. US can be any fearful response to anything.

Question 4

Renewal effect

Answer 4

Acquisition context in different location. Persistence of extinction in certain contexts. If you treat extinction in a lab, can be back in place where fear was acquired.

Question 5

Explanation of relapse

Answer 5

Fear memory resurfaces bc:

The initial memory still exists, but an inhibitory memory is formed from hippocamp to vmPFC

The fear memory in the amygdala may resurface

Question 6

Re-acquisition

Answer 6

New fear learning experience of the original CS-US pairing or similar context.