Paralysis loss or impairment of voluntary muscular movement caused by structural abnormalities of nervous or animal tissue or by metabolic disturbances in fibre bundle perform.Paralysis will affect the legs and lower a part of the body or both arms and both legs. generally the muscles of the lower face, arm, and leg on only 1 aspect of the body ar concerned (hemiplegia). Most diseases that cause palsy are often divided into two main teams reckoning on whether they entail structural alterations in nervous or animal tissue, or lead to metabolic disturbances in fibre bundle perform. Some act systemically and affect one in every of the three parts within the motor system additional or less extensively and completely. More often, however, one element or neighboring portions of two of the three parts ar concerned over a restricted extent by a single focal lesion. palsy is the complete loss of muscle perform for one or additional muscle teams. palsy will cause loss of feeling or loss of mobility within the affected area. palsy may be localized, or generalized, or it’s going to follow a certain pattern. Most paralyses caused by system harm ar constant in nature; however, there ar varieties of periodic palsy, as well as sleep palsy, that ar caused by other factors.