Fig. 2 (IMAGE) Osaka University Caption Questionnaire used to survey the content of thoughts and feelings. Credit adapted from Iwata et al., Nature Communications, Hippocampal sharp-wave ripples correlate with periods of naturally occurring self-generated thoughts in humans; DOI: 10.1038/s41467-024-48367-1; licensed under CC BY 4.0 Usage Restrictions Credit must be given to the creator. License CC BY 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.