Paralysis : Causes, Signs and Symptoms, Types Straight from your Specialist Doctor Paralysis is loss of movement or the sensation of one part of the body or one side of the body. This may include any part of the body like face, upper limb, both the legs or one side of the body this depends on the sight of the problem present in the brain as well as in the spinal cord or the peripheral nerve. If there is weakness in left part of the body then we should suspect the problem in right part of the bra