Hi Joshua! Where I've seen that type of change is mindfulness-based training. It seems to teach people how to attend to and handle those inner experiences of anxiety/pain/cravings without automatically reacting. Mindfulness training actually enhances (rather than turns off) the sensory components of this system while damping down the usual mental elaboration of them (eg default mode processing).

I've also seen an acceptance-based training for OCD that seems to dampen down the system by repeated NOT reacting to inner experiences with typical compulsions.

What I haven't seen evidence for is a training that just shuts the whole pain system off. Definitely it's about learning to make peace with the inner experiences.

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