puppets resembled dolls and were used for entertainment in theatre, homes, and religious festivals. Karakuri puppets that were used for theater plays were called butai karakuri. Small karakuri puppets found in homes, called zashiki kurakuri, were placed on tables to dance, beat drums, or serve drinks. The puppets used in religious festivals were known as Dashi karakuri, and they served to reenact myths and legends. France In the 18th century, French inventor Jacques de Vaucanson created a significant humanoid automaton called The Flute Player. This wooden, human-sized robot was capable of playing various melodies with the flute. It consisted of a system of bellows, pipes, weights, and other mechanical components to simulate to the muscles necessary to play the flute. Applications Humanoid robots are now used as research tools in several scientific areas. Researchers study the human body structure and behavior (biomechanics) to build humanoid robots. On the other side, the attempt to simulate the human body leads to a better understanding of it. Human cognition is a field of study which is focused on how humans learn from sensory information in order to acquire perceptual and motor skills. This knowledge is used to develop computational models of human behavior, and it has been improving over time. It has been suggested that very advanced robotics will facilitate the enhancement of ordinary humans. See transhumanism. Medical and research Humanoid robots are a valuable resource in the world of medicine and biotechnology, as well as other fields of research such as biomechanics and cognitive science. Humanoid robots are being used to develop complex prosthetics for individuals with physical disabilities such as missing limbs. The WABIAN-2 is a new medical humanoid robot created to help patients in the rehabilitation of their lower limbs. Although the initial aim of humanoid research was to build better orthosis and prosthesis for human beings, knowledge has been transferred between both disciplines. A few examples are powered leg prosthesis for the neuromuscularly impaired, ankle-foot orthosis, biological realistic leg prosthesis, and forearm prosthesis. Humanoid robots can be used as test subjects for the practice and development of personalized healthcare aids, essentially performing as robotic nurses for demographics such as the elderly. Humanoids are also suitable for some procedurally-based vocations, such as reception-desk administrators and automotive manufacturing line workers. In essence, since they can use tools and operate equipment and vehicles designed for the human form, humanoids could theoretically perform