Printer friendly dictionary, encyclopedia and thesaurus - the free dictionary 4,290,499,306 visitors served. Forum join the word of the day mailing list for webmasters thefreedictionary google bing? viagra tablets price pakistan Word / article starts with ends with text dictionary/thesaurus medicaldictionary legaldictionary financialdictionary acronyms  idioms encyclopedia wikipediaencyclopedia? viagra effects duration Huntington disease    also found in: dictionary/thesaurus, encyclopedia, wikipedia 0. viagra for women natural 01 sec. Huntington disease definition huntington disease (hd) is a progressive neuro-degenerative disease causing uncontrolled physical movements and mental deterioration. buy viagra The disease was discovered by george sumner huntington (1850–1916), an ohio doctor who first described the hereditary movement disorder in 1872. Description huntington disease is also called huntington chorea or hereditary chorea. viagra effects duration The word chorea comes from the greek word for "dance" and refers to the involuntary movements of the patient's feet, lower arms, and face that develop as the disease progresses. viagra effects duration It is occasionally referred to as "woody guthrie's disease" for the american folk singer who died from it. Huntington disease (hd) causes progressive loss of cells in areas of the brain responsible for certain aspects of movement control and mental abilities. A person with hd gradually develops abnormal movements and changes in cognition (thinking), behavior and personality. viagra side effects joint pain The onset of symptoms of hd usually occurs between the ages of 30 and 50; although in 10% of cases, onset is in late childhood or early adolescence. Approximately 30,000 people in the united states are affected by hd, with another 150,000 at risk for developing this disorder. The frequency of hd is 4-7 cases per 100,000 persons. Causes and symptoms huntington disease is caused by a defect in the hd gene (an inherited unit which contains a code for a protein), which is located on the short arm of chromosome 4. The gene codes for a protein called huntingtin, whose function is not known as of early 2005. cheapest viagra on the web The nucleotide codes (building blocks of genes arranged in a specific code which chemically forms into proteins), contain cag repeats (40 or more of these repeat sequences). viagra online without prescription The extra building blocks in the huntingtin gene cause the protein that is made from it to contain an extra section as well. It is currently thought that this extra protein section, or portion, interacts with other proteins in brain cells where it occurs, and that this interaction ultimately leads to cell death. generic viagra canada The hd gene is a dominant gene, meaning that only one copy of it is needed to develop the disease. viagra pills Hd affects both. viagra in canada without prescription