Kinesiology, as it is know in physical education, physical therapy, orthopedics, and physical medicine, is the study of human movement from the point of view of the physical sciences. The study of the human body as a machine for the performance of work has its foundations in three major areas of study-namely, mechanics, anatomy, and physiology; more specifically, biomechanics, musculoskeletal anatomy, and neuromuscular physiology. The accumulated knowledge of these three fields forms the foundation for the study of human movement. The major contribution applied kinesiology makes to standard diagnostic procedures is functional evaluation. Most standard diagnosis without applied kinesiology is directed toward discovering and evaluating pathology. Many individuals clearly pass a physical examination directed toward that end, but they may still complain of headaches, fatigue, and other general health problems. Applied kinesiology helps discover the reason for functional disturbances, and suggests a direction for corrective therapy. When applied kinesiology is used in conjunction with the standard methods of diagnosis developed in medicine, osteopathy, and chiropractic, one has a greater ability to understand a patient's health problem.