Aphasia is a language-processing disorder that impairs a person's ability to speak or understand speech. The main cause of Aphasia is stroke. Approximately 25% - 40% of Americans who suffer a stroke each year will acquire aphasia. It can also result from head injury, brain tumor or other neurological causes. Aphasia manifests itself differently in people, but generally the individual's intelligence is intact.

For more information on Aphasia visit the National Aphasia Association at http://www.aphasia.org

Myasthenia gravis is an autoimmune neuromuscular disorder that causes muscle weakness. "Autoimmune" means that a person's immune system malfunctions and it creates antibodies that attack the person's own cells. In myasthenia gravis, the antibodies interfere with the transmission of nerve signals to the muscles.

For more information on Myasthenia Gravis visit the Myasthenia Gravis Foundation of America at http://www.myasthenia.org/

Scleroderma is a disease that can cause thickening, hardening, or tightening of the skin, blood vessels and internal organs. Scleroderma is chronic, which means it can last a long time. There are two types of scleroderma: Localized scleroderma which mainly affects the skin and Generalized scleroderma which may affect many parts of the body.

For more information on Scleroderma visit the Scleroderma Foundation at http://www.scleroderma.org/

Scoliosis is a medical condition in which a person's spine is curved from side to side, shaped like an "s", and may also be rotated.

For more information on scoliosis visit the National Scoliosis Foundation at http://www.scoliosis.org