Today’s highlighted research study “Mindfulness meditation modulates reward prediction errors in a passive conditioning task.” Indicates that meditation may increase equanimity.
Meditation appears to alter the individual’s nervous system in a wide variety of ways. Today’s study indicates that one of the changes is in the brain structure responsible for internal sensations resulting in a muted response to rewards.
This is an indication of improved equanimity in meditators, producing less extreme responses to events. In Buddhism, this is one of the four sublime states producing a balance of mind. The mind appreciates life at a more uniform level with the lows not as low and the highs not as high.
It is wondrous that this can be measured with modern neuroimaging.
RESEARCH NEWS – Experienced meditators exhibit reduced neural responses to reward prediction errors.
Kirk, U., & Montague, P. R. (2015). Mindfulness meditation modulates reward prediction errors in a passive conditioning task. Frontiers in Psychology, 6, 90. doi:10.3389/fpsyg.2015.00090
Reinforcement learning models have demonstrated that phasic activity of dopamine neurons during reward expectation encodes information about the predictability of reward and cues that predict reward. Self-control strategies such as those practiced in mindfulness-based approaches is claimed to reduce negative and positive reactions to stimuli suggesting the hypothesis that such training may influence basic reward processing. Using a passive conditioning task and fMRI in a group of experienced mindfulness meditators and age-matched controls, we tested the hypothesis that mindfulness meditation influence reward and reward prediction error (PE) signals. We found diminished positive and negative PE-related blood-oxygen level-dependent (BOLD) responses in the putamen in meditators compared with controls. In the meditator group this decrease in striatal BOLD responses to reward PE was paralleled by increased activity in posterior insula, a primary interoceptive region. Critically, responses in the putamen during early trials of the conditioning procedure (run 1) were elevated in both meditators and controls. Overall, these results provide evidence that experienced mindfulness meditators are able to attenuate reward prediction signals to valenced stimuli, which may be related to interoceptive processes encoded in the posterior insula.