Subject: The Activator Adjusting Instrument – Biomechanical
Reference: Tony S. Keller; J.B. Lehneman…Musculoskeletal Research Lab, February 1994: pp.1-16
Introduction: The Activator Adjusting Instrument (AAI) is a devise used for chiropractic manipulations. The device is intended to produce repeatable impacts (manipulations) at various force settings. The force is easily adjusted by turning the small knob on the lower part of the device.
Objective: The purpose of this study is to determine the effect of the force setting, and preload on the actual force delivered by the AAi to the impact surface.