Glossary Paralysis - A decrease or deficiency of voluntary movement in a body part, caused by damage or disease of the nerve, brain, or spinal cord. Meningitis - Inflammation of the meninges caused by viral or bacterial infection. Spasticity - Spasticity is a continual and unwanted contraction of one or more muscle groups. Gastroesophageal - of or relating to the stomach and esophagus