@stantallusa OK, thanks for clarifying. What comes to my mind is the foramen which are the spaces between each vertebrae where the spinal nerves exit the spine. These can get closed down with arthritic bone growth compressing the nerves. The Misonex ultrasonic scalpel can be used for this and they describe this on their website because the tool is flat and can slice thin slices of bone with accuracy to open up the foramen and free the trapped nerves and avoid hitting the nerves. It is specifically for cutting bone. In other places in the body nerves can get trapped in small spaces where they travel around and through muscle bundles, tendons and ligaments and past joints.