Conjoined twins Abby and Brittany Hensel have shared a new video that describes how they "have defied the odds" and are thriving "despite their unique anatomy ... to coordinate movements for their ...

The film discusses the intricate relationship between muscles and bones, highlighting the mechanics of body movement. It explains how muscles work by contracting and relaxing in coordination with ...

Since the 1930s, the so-called homunculus map has shown how different parts of the brain's motor cortex may control movement to different parts of the body. But it may be missing an important ...