Artificial muscle refers to materials or devices that can mimic the contraction and relaxation of natural muscles. These technologies are designed to respond to stimuli, such as electrical signals or changes in temperature, allowing them to perform tasks similar to biological muscles. They are often made from polymers or other flexible materials that can change shape or size when activated. Applications of artificial muscles include robotics, prosthetics, and soft robotics. In robotics, they enable more lifelike movements, while in prosthetics, they can provide better control and functionality for users. Researchers are continually exploring new materials and designs to enhance the performance and efficiency of artificial muscles.