Changes in hierarchical brain dynamics of rumination following mindfulness-based cognitive therapy for depression

Major depressive disorder is a leading cause of disability worldwide and its onset is linked to depressive ruminative thought patterns. Mindfulness-based cognitive therapy (MBCT) is an evidence-based treatment for depression that targets the ability to recognize, distance from, and disengage from ruminative thoughts. A study of 80 patients with depression compared changes in hierarchical brain organization during MBCT combined with standard treatment versus standard treatment alone. Researchers found that global brain directedness increased during rumination in the MBCT group but showed no changes during rest. Increased brain hierarchy during rumination was associated with improvements in clinical and behavioral outcomes. Increased brain hierarchy following mindfulness training may represent a shift away from self-reinforcing negative mental loops toward more differentiated and less coupled cognitive and bodily cycles, supporting MBCT's ability to interrupt ruminative processes.