by: Keely
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Date: Thu, 3 Jun 2010 Time: 12:45 AM -
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We all know Christmas. It is a great festival that everyone enjoys themselves very much. Different people have different way to celebrate Christmas. How to Celebrate Christmas in an Interesting Way? Seeing Christmas is believing. I share you something more about this festival.
Article Source: DirectoryArticles.com
During Christmas time, the world becomes ablaze with a light show that enthrals and amazes but which at times makes you dizzy. It’s all explained in the science behind a magical season, writes Andrew Ho. FAIRY lights and Christmas decorations are essential features of the festive season. This marks a celebratory time for families and friends who love to hang out and enjoy something spectacular.
But you may be wondering why Christmas lights sometimes create illusionary effects that make viewers feel dizzy. This illusionary effect may look like the spirit of Christmas but it is actually caused by an imbalanced neural movement in the optic nerves of the brain.
We naturally see an object when light is reflected on it. But that is only one part of the story. After the reception of light, the retina in the back of the eyes sends signals to the brain and the brain then splits the incoming message into several parts before it attempts to understand the image.
As soon as the brain receives a message from the optic nerves, it triggers a chain of reactions that involve areas of the brain called the lateral geniculate nucleus (LGN) and the visual cortex. The visual cortex refers to the primary visual cortex and extrastriate visual cortical areas, which is the point between the eye and the image in your mind. What you get in the end is an image that has been recreated in your brain.
But as soon as the signal arrives at the primary visual cortex, also known as V1, it triggers the flow of information into two primary pathways: the dorsal stream and the ventral stream which lead to what we know as the mind’s eye. And scientists believe that following these two streams creates a dizzy effect in the brain.
How interesting the Christmas is. It is a really popular festival all over the world. There are many kinds of activities to celebrate Christmas.
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