Grade | Definition | Indication |
I | Low velocity, Low amplitude | Pain inhibition |
II | Low velocity, Large amplitude in beginning to middle of pathological range | Pain inhibition |
III | Low velocity, Large amplitude in middle to end of pathological range | Mechanical change, Pain inhibition |
IV | Low velocity, Low amplitude at the end of the pathological range | Mechanical change, Pain inhibition |
V | High velocity, Low amplitude (thrust) | Mechanical change, Pain inhibition |