Medical Definition of IMMUNOASSAY. : a technique or test (as the enzyme-linked immunosorbent assay) used to detect the presence or quantity of a substance (as a protein) based on its capacity to act as an antigen or antibody.â immunoassay transitive verb. â imÂ·muÂ·noÂ·asÂ·sayÂ·able \-a-ËsÄ-É-bÉl\ adjective.efinition of IMMUNOASSAY. : a technique or test used to detect the presence or quantity of a substance (as a protein) based on its capacity to act as an antigen. â imÂ·muÂ·noÂ·asÂ·sayÂ·able \-a-ËsÄ-É-bÉl\ adjective. ADVERTISEMENT. noun imÂ·muÂ·noÂ·asÂ·say \Ëim-yÉ-nÅ-Ëas-ËÄ, im-Ëyue-ËyÃ¼-, -nÅ-a\. ËsÄ
Have you noticed a slight shaking or tremor in your finger, thumb, hand, chin or lip? Does your leg shake when you sit down or relax? Twitching or shaking of limbs is a common early sign of Parkinson's disease. Shaking can be normal after lots of exercise or if you have been injured.
In time, Parkinson's affects muscles all through your body, so it can lead to problems like trouble swallowing or constipation. In the later stages of the disease, a person with Parkinson's may have a fixed or blank expression, trouble speaking, and other problems. Some people also lose mental skills (dementia). People usually start to have symptoms between the ages of 50 and 60.