How do neuroscience play a role in expressive art therapy?

There seems to have new findings on how our brains manage with bad memories.  I am curious to know exactly how our brains function when it is attacked by traumatic experiences and how exactly our brain wired if we use talk therapy and non-verbal therapy such as expressive/creative arts and play therapy. 

What works and what does not?  If talk therapy such as CBT is effective to treat PTSD or other anxiety-related symptoms, how does it actually re-wire the parts of our brains that store the traumatic memories?

And vice-versa for Non-talk therapy.

I found these articles that have a piece of new data regarding the latest findings that may shed some lights on my above questions.

https://www.sciencealert.com/hippocampus-inhibition-pathways-prefrontal-cortex-post-traumatic-stress-disorder-relapses (website)

https://www.nature.com/articles/s41593-018-0073-9 (research journal)