Bio-response testing is a term used to describe proccedures that allow a practiotioner to gain pertinent information about a patient. Chiropractors have been using these tests for approximately fifty years as part of their analysis to determine where, when and what direction to adjust. I take things a couple steps further by also checking for emotional and chemical interferences to healing. The most common bio-response tests are: muscle tests, leg length checks and the occipital drop. I believe, through my testing and comparing, that these tests all give the practitioner the same results. Personally I use all three test but the one I use most frequently is the occipital drop as seen below.
These tests give a yes/no binary answer to a question posed. The question is posed and the body responds. See the pictures to see a no/yes answer. 
This is an example of a no answer. When the thumbs are placed at the base of the skull they are level.
This is an example of a yes answer. When the thumbs are placed at the base of the skull the left side is considerable lower and thus called the "occipital drop."
God Bless,
David Shores DC, holistic chiropractor, Encinitas, Cardiff, Carlsbad
1524 Encinitas Blvd.
Encinitas, Ca 92024
(760) 753-4300
Disclaimer: This information is for education purposes only. The doctor does not diagnose or treat any medical conditions.
