There's a very interesting book Your Body Believes Every Word You Say. It isn't about PTSD or body memories but it is about how what we say and think becomes manifested by our bodies.

The good news is how we can make it work for our good by positive thoughts and actions.

It shows how powerful and magnificent the mind is... nothing mystical about this... not too deeply scientific either. It's a good read.

I posted this here because it shows that anything can be made into a body memory if that is what is needed...