Mindfulness and Self-Compassion Meditation for Combat Posttraumatic Stress Disorder: Randomized Controlled Trial and Mechanistic Study

Background: "Mindfulness meditation" is an ancient "Mind-Body" attentional technique for cultivating present-focused, non-judgmental attention to sensory, interoceptive, emotional, and cognitive processes. It is proposed to lead to a greater sense of well-being and acceptance, greater cognitive flexibility, and better tolerance of painful and distressing physical, emotional, and cognitive phenomena. Our group has found a model of emotional meta-awareness leads to decreased amygdala and increased medial prefrontal cortex (mPFC) activation. Mindfulness meditation has also been suggested to work by volitionally altering self-related cognitive/emotional processing to shift away from the predominate 'narrative' (and potentially ruminative) mode to a more 'experiential', present-centered mode in which arising sensations, percepts, emotions, and cognitions can be perceived with greater equanimity and flexibility. Mindfulness-based Stress Reduction (MBSR) is helpful for coping with chronic pain, fibromyalgia, and distress and anxiety associated with major medical disorders, and Mindfulness-based Cognitive Therapy (MBCT) for preventing depression relapse in patients. "Compassion meditation" is likewise an ancient practice for cultivating and stabilizing a sense of pro-social, empathic, kind/loving and compassionate regard to one's self and others, and in the Tibetan tradition, is based upon a 'foundation' of mindfulness. A single small trial found a loving-kindness meditation improved chronic lower back pain symptoms, and neuroimaging studies have found effects on emotional neurocircuitry.

Objective/Hypothesis: We hypothesize that practice of mindfulness and Tibetan self-compassion meditation by PTSD patients will lead to 1.) improvement in PTSD and other symptoms and quality of life 2.) improved emotional regulation, attentional control, increased 'mindfulness' and self-compassion, and 3.) strengthening of mPFC circuits during emotional provocation. There are theoretical considerations and limited empirical data that mindfulness and Tibetan compassion meditation may be useful for combat-related PTSD, which is marked by exaggerated emotional responses and distress to trauma memories and cues, distressing guilt and self-blame, and emotional dysregulation; however, the acceptability and efficacy of mindfulness and Tibetan compassion meditation not been demonstrated in combat PTSD. A pilot study at the Ann Arbor VA PTSD Clinic adapted a psychotherapy using mindfulness meditation, mindful stretching exercises, and Tibetan compassion meditation for use in combat PTSD, and found significant reductions in 'avoidant' PTSD symptoms and self-blame cognitions compared to a treatment-as-usual group. Importantly, we were also able to identify some obstacles to acceptability that have provided our group with greater insight and experience into how to acceptably and effectively deliver meditation programs to combat veterans seeking treatment for PTSD. PTSD neuroimaging studies implicate deficits during emotional provocation in medial prefrontal cortex (mPFC), associated with emotional regulation.

Specific Aims:

Aim 1. Further develop a manualized group psychotherapy based on mindfulness and Tibetan self-compassion meditation for combat PTSD.

Aim 2. Formally test our meditation intervention for PTSD in a randomized controlled trial.