"Born in 1830, the French physician and physiologist Etienne-Jules Marey became interested in movement at an early stage of his career: the movement of blood as it circulated, the movements which controlled the beating of the heart, then those of the muscles and nerves. To improve his studies, he developed more and more precise recording instruments. Once he had explained the internal movements of the body, Marey extended his investigations to the motion of the bodies as wholes."
Étienne-Jules Marey "Like his contemporary Eadweard Muybridge, Marey, a physiologist, was interested in the science of human movement. By 1882, he had developed a single camera method that he called chronophotography, which allowed him to make images of human and animal movement. His camera was the forerunner of the motion picture camera. Marey’s chronophotographs were some of the first images to illustrate the exact process of body movement.”