Puzzle Solving (IMAGE) Society for Neuroscience Caption The drug-seeking phase requires the completion of 2 distinct response sequences. If either the 1st or 2nd response sequence during the drug-seeking period is performed incorrectly (indicated by dashed lines), no tone is presented, and the animal would have to restart the puzzle from the beginning. Credit Singer et al., <i>JNeurosci</i> (2017) Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.