Stop motion (also known as stop frame) is ananimation technique to make a physically manipulated object appear to move on its own. The object is moved in small increments between individually photographed frames, creating the illusion of movement when the series of frames is played as a continuous sequence. Dolls with movable joints or clay figures are often used in stop motion for their ease of repositioning. Stop motion animation using plasticine is called clay animation or “clay-mation”. Not all stop motion requires figures or models; many stop motion films can involve using humans, household appliances and other things for comedic effect. Stop motion using objects is sometimes referred to as object animation.

As you can see in the images below, changes in position over a series of still images can be transformed into animation by playing them quickly one after the other.  These are photos were taken by the artist and scientist Eadweard Muybridge.  Muybridge did pioneering work in photographic studies of motion, and early work in motion-picture projection.