Punishment on Pause: Preliminary Evidence That Mindfulness Training Modifies Neural Responses in a Reactive Aggression Task

Reactive aggression, a hostile response to perceived threat, has been linked to emotion regulation failures. A pilot study compared two weeks of mindfulness training (MT) to active coping training (CT) in healthy adults, using fMRI during a retaliatory aggression task. The groups did not differ in aggression levels. However, MT participants showed greater ventromedial prefrontal cortex (vmPFC) activity during punishment events, while CT participants showed greater dorsomedial prefrontal cortex (dmPFC) activity when deciding retaliation. The findings suggest mindfulness and cognitive control training may regulate aggression through different neural circuits at different stages of provocation.

Study at a glance

Abstract

Reactive aggression, a hostile retaliatory response to perceived threat, has been attributed to failures in emotion regulation. Interventions for reactive aggression have largely focused on cognitive control training, which target top-down emotion regulation mechanisms to inhibit aggressive impulses. Recent theory suggests that mindfulness training (MT) improves emotion regulation via both top-down and bottom-up neural mechanisms and has thus been proposed as an alternative treatment for aggression. Using this framework, the current pilot study examined how MT impacts functional brain physiology in the regulation of reactive aggression. Participants were randomly assigned to 2 weeks of MT ( n = 11) or structurally equivalent active coping training (CT) that emphasizes cognitive control ( n = 12). Following training, participants underwent functional magnetic resonance imaging (fMRI) during a retaliatory aggression task, a 16-trial game in which participants could respond to provocation by choosing whether or not to retaliate in the next round. Training groups did not differ in levels of aggression displayed. However, participants assigned to MT exhibited enhanced ventromedial prefrontal cortex (vmPFC) recruitment during punishment events (i.e., the aversive consequence of losing) relative to those receiving active CT. Conversely, the active coping group demonstrated greater dorsomedial prefrontal cortex (dmPFC) activation when deciding how much to retaliate, in line with a bolstered top-down behavior monitoring function. The findings suggest that mindfulness and cognitive control training may regulate aggression via different neural circuits and at different temporal stages of the provocation-aggression cycle. Trial Registration: identification no. NCT03485807.