Speech requires rapid movements of the lips, tongue and jaw, and so it may be better controlled by the left hemisphere. Understanding how the two hemispheres control different actions could ultimately lead to new strategies for restoring skills lost as a result of brain injuries such as stroke.
Views 1, Annotations Open annotations. The current annotation count on this page is being calculated. Image credit: Public domain. Preferred hand 'set in the womb' 21 Jul 04 Health. Left-handers 'better in fights' 08 Dec 04 Health.
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Decoding the big viral hack. Kajol's take on gender-equal parenting hits all the right notes in this video. What's new in the beauty industry? The ANU researchers set up tests intended specifically to test the speed of information flow between the two sides of the brain. There were 80 right-handers and 20 left-handers involved in the study. In one test, a computer would show a single dot either to the left or to the right of a dividing line, and the subjects had to press a button to indicate which side the dot showed up on.
The left-handed subjects were faster overall at this task. In another test, subjects had to match up multiple letters that appeared in some cases on either side of the line and in other cases on just one side of the line.
In this test, the left-handed subjects were faster at matching letters that appeared on both sides of the line, while the right-handed subjects were quicker at matching up letters that appeared on only one side of the line.
This latter observation could indicate that righties are faster than lefties at processing stimuli that targets only one hemisphere of the brain. According to lead researcher Dr. Nick Cherbuin in an interview with AM ABC, the results support the anatomical observation that the major "connection between the left brain and the right brain" is "somewhat larger and better connected in left-handers. It could mean that left-handers have a slight advantage in sports, gaming and other activities in which players face large volumes of stimuli being thrown at them simultaneously or in quick succession.
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