Blog #4

Read an article of your choice. Summarize it 5-8 sentences.  Explain why you think it is important and put a link to the article
http://www.sciencenews.org/view/generic/id/63826/title/How_the_brain_chooses_sides
How the Brain Chooses Sides
Our brain helps us decide which hand to use in our everyday day life.  The left posterior parietal cortex is one part of the brain that controls the buttons, like typing, for the human body.  The "Proceedings of the National Academy of Sciences" stated that a brief neural tussle creates a competition which allows one hand to win the movement over the other.  Oliveira created an experiment with right-handed people using the table containing a motion-tracking system and directions on which hand to use.  When the volunteers are able to decide which hand to use their speed are slower by 30 milliseconds, still most volunteers uses right hand.  Later, the scientists briefly disrupted activity in the posterior parietal cortex on the left side of the brain, the  left posterior parietal cortex, the volunteers uses their left hand 13.5% more often than before.  Other the other hand, when scientists disrupted the right posterior parietal cortex, the result did not change.  This shows the left side of the brain plans movement.  This is important because it explains to people why they use a certain hand on a certain time.