In the early 1960's Dr. George J. Goodheart Jr., a chiropractor from Detroit, Michigan, observed that muscles often tested weak even though there was no atrophy or other apparent reason for the weakness. Upon further investigation, Goodheart and other chiropractors discovered that there were numerous reasons for muscles to test weak. It was discovered, for example, that each muscle correlates to a specific reflex point, organ or gland, acupuncture meridian, tooth, nutritional requirement, and vertebral segment. From this perspective, so much information can be obtained about a patient's state of health with muscle testing. These groundbreaking discoveries laid the groundwork for the systems of diagnoses and treatment protocols of Applied Kinesiology today.