Subject: The Activator Adjusting Instrument - Biomechanical

Title: Dependence of the Delivered Force on the Force Setting on the Activator Adjusting Instrument

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.