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National Institutes of Health
People can lose all or part of an arm or leg for a number of reasons. Common ones include
If you are missing an arm or leg, an artificial limb can sometimes replace it. The device, a prosthesis, can help you to perform daily activities such as walking, eating, or dressing. Some artificial limbs let you function nearly as well as before.
(03/19/2013, National Institute of Biomedical Imaging and Bioengineering)
References and abstracts from MEDLINE/PubMed (National Library of Medicine)