Applications of virtual reality systems in medical education. Here, two doctors use a system developed at NASA's Ames Research Centre in Menlo Park, California, to study the anatomy of the human leg. They both wear a headset equipped with 3-D video displays to view the computer-generated graphical images - one is shown between the two doctors. Physical exploration of the leg anatomy is afforded by using the dataglove, a black rubber glove with woven optical fibre sensors, which relays data on their physical hand movements back to the computer.