NSA is based on the notion that the nervous system is the "information superhighway" inside of us. The nervous system is the communicator between the brain and every other organ, tissue and cell in the body.
Without using any more than the small amount of pressure that could comfortably applied to a closed eyelid, NSA allows the body to reflect on trapped tension. The place, force and direction of each contact is determined by the Doctor using indicators of specific tension patterns in showing up in the body at that particular moment in time.
These tension patterns are born from our bodies' defensive physiological responses. The contacts are made to help connect our brains with areas of the body that are already connected and at ease, thus expanding ease to the rest of the body.
The particular tension pattern that is dominant in the body at that time will begin to shift, and the energy that it releases will become fuel availablefor making healing changes. At this point, neural pathways shift which then allow the body to drop or alter tension being held in the active and passive tissues around the spine.