NET is used by Body-oriented practitioners to help physical problems that have an associated stress component. Stress can definitely be a factor in acute situations, and it is also often a factor in chronic and hard-to-resolve conditions.
When doing NET, the practitioner uses a functional neurology manual muscle test as a tool to help identify involuntary physiological responses. In this way, the muscle test is used as a gauge of autonomic reactivity to given physical and/or verbal stimuli.