Wikipedia:Main Page history/2011 April 11

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An illustration of Parkinson's disease by William Richard Gowers (1886)

Parkinson's disease is an age-related degenerative disorder of the human brain. It rarely arises before the age of 40, but afflicts more than 1% of people over 60 and 4% of people over 80. The most obvious symptoms are movement-related, including shaking, rigidity, slowness of movement and difficulty with walking gait. Cognitive, sensory, sleep and emotional problems may also occur, especially in the later stages. The most noticeable symptoms are brought about by the death of brain cells that produce the chemical dopamine. Some cases are caused by genetic factors, but for most cases the causes are not known. Diagnosis is based on assessment of symptoms. In spite of extensive scientific research, no cure has yet been found. Modern treatments are effective at managing the early motor symptoms of the disease, mainly through the use of levodopa and dopamine agonists. In the later stages, however, these treatments gradually lose their effectiveness. The disease is named after British apothecary James Parkinson, and his birthday, April 11, has been designated Parkinson's Disease Day. (more...)

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  • In the news

  • American film director Sidney Lumet (pictured) dies at the age of 86.
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  • At least 27 people are killed in anti-government protests in the Syrian city of Daraa.
  • The government of the People's Republic of China announces the arrest of artist and dissident Ai Weiwei.
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  • On this day...

    April 11

    Emir Abdullah of Transjordan

  • 1814 – The Treaty of Fontainebleau was signed, ending the War of the Sixth Coalition, and forcing Napoleon to abdicate as ruler of France and sending him into exile on Elba.
  • 1908SMS Blücher, the last armored cruiser to be built by the German Imperial Navy, launched.
  • 1921Emir Abdullah (pictured) established the first centralized government in the recently created British protectorate of Transjordan.
  • 1979Uganda–Tanzania War: The Uganda National Liberation Army and Tanzanian forces captured Kampala, forcing Ugandan President Idi Amin to flee.
  • 1996 – Seven-year-old Jessica Dubroff was killed in a plane crash in Cheyenne, Wyoming, while attempting to set a record as the youngest person to pilot an airplane across the United States.
  • More anniversaries: April 10April 11April 12

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    Pholiota malicola

    Pholiota malicola is a species of fungus in the Strophariaceae family of mushrooms. All of the 1,316 species in this group are saprotrophs, growing on various kinds of decaying organic matter.

    Photo: JJ Harrison

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