Parkinson’s disease: A progressive disorder of the nervous system marked by muscle tremors, muscle rigidity, decreased mobility, stooped posture, slow voluntary movements, and a mask-like facial expression.
Multiple sclerosis: A disorder of the central nervous system marked by weakness, numbness, a loss of muscle coordination, and problems with vision, speech, and bladder control. Multiple sclerosis is thought to be an autoimmune disease in which the body's immune system destroys myelin. Myelin is a substance that contains both protein and fat (lipid) and serves as a nerve insulator and helps in the transmission of nerve signals
Endocrine system: A regulatory system comprised of the endocrine glands that controls vital body functions such as metabolic activity, growth, and reproduction.
Catheter: A thin, flexible tube through which fluids or other materials enter or leave the body.