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Back to the Future is a 1985 American science-fiction comedy film directed by Robert Zemeckis, written by Zemeckis and Bob Gale, produced by Steven Spielberg, and starring Michael J. Fox, Christopher Lloyd, Lea Thompson, and Crispin Glover. The film tells the story of Marty McFly, a teenager who is accidentally sent back in time from 1985 to 1955. He meets his parents in high school, accidentally attracting his mother's romantic interest. Marty must repair the damage to history by causing his parents to fall in love, while finding a way to return to 1985.

Back to the Future had the fourth-highest opening weekend of 1985 and was the top grossing film of the year.^[20] This film is set to receive a 25th anniversary theatrical re-release in the U.K. and the U.S. in October 2010 to coincide with the Universal Studios Home Video 25th Anniversary DVD and Blu-ray disc releases of the Trilogy

President Ronald Reagan, a fan of the film, referred to the movie in his 1986 State of the Union Address when he said, "Never has there been a more exciting time to be alive, a time of rousing wonder and heroic achievement. As they said in the film Back to the Future, 'Where we're going, we don't need roads.'"^[35] When he first saw the joke about him being president, he made the projectionist of the theater stop the reel, roll it back, and run it again

Parkinson's disease (PD) belongs to a group of conditions called motor system disorders, which are the result of the loss of dopamine-producing brain cells. The four primary symptoms of PD are tremor, or trembling in hands, arms, legs, jaw, and face; rigidity, or stiffness of the limbs and trunk; bradykinesia, or slowness of movement; and postural instability, or impaired balance and coordination. As these symptoms become more pronounced, patients may have difficulty walking, talking, or completing other simple tasks. PD usually affects people over the age of 50.  Early symptoms of PD are subtle and occur gradually.  In some people the disease progresses more quickly than in others.  As the disease progresses, the shaking, or tremor, which affects the majority of PD patients may begin to interfere with daily activities.  Other symptoms may include depression and other emotional changes; difficulty in swallowing, chewing, and speaking; urinary problems or constipation; skin problems; and sleep disruptions.  There are currently no blood or laboratory tests that have been proven to help in diagnosing sporadic PD.  Therefore the diagnosis is based on medical history and a neurological examination.  The disease can be difficult to diagnose accurately.   Doctors may sometimes request brain scans or laboratory tests in order to rule out other diseases.