It is the stuff of the Hollywood movie Inception: a dreamworld that can be manipulated at will. In fact, for more and more of us, it is becoming a reality, with the number of people experiencing lucid dreams rising rapidly.
Someone having a lucid dream realizes they are dreaming and may from then on in "direct" the action. Alternatively, they may simply "watch" the dream unfold. And while the description may seem bizarre, the process is far from alien to many of us.
Studies suggest that the number of people in the Western world experiencing the occasional lucid dream has risen by between 10 and 40 percent since the 1980s. Today, they are so common that about one in eight of us will have one in our lives. Despite this, little is known about what triggers them - or what is behind the rise.
Mark Blagrove, a psychologist who runs a sleep laboratory at the University of Swansea, said that "people's abilities during dreaming are altering" as they become more adept at recognizing they are able to control their dreams. He also thinks that dreaming may help us back up our memories.
Research carried out at the respected Harvard University in the US showed the brain to be hard at work during lucid dreams. In fact, the level of mental activity in some parts of the brain was similar to that of an awake person.
2010-10-21 20:36 编辑：kuaileyingyu
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