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One common handedness theory is the brain hemisphere division of labor. In most people, the left side of the brain controls speaking. The theory suggests it is more ...
The identification of rare mutations in this gene that are more common in left-handers suggests that microtubules are involved in setting up the brain's normal asymmetries, Francks said.
The frequency of left-handedness in monozygotic dichorionic twins was 22% and the data of frequencies of left-handedness in monozygotic monochorionic twins was 23%. [2] Subsequently, this emphasized that chorion did not affect left-handedness. Similarly, placentation or the placement of the placenta does not affect left-handedness. [5]
Common problems faced by left-handed operators include the inability to keep materials steady, and difficulty reaching the on/off switch, especially in emergency situations. [2] Table saws, whose blades protrude from the top of a table and pose the risk of losing fingers or hands, have their cutting area on the right side. This makes it ...
An older study found that left-handed people were better at "divergent thinking", and a more recent research cites lefties have better working memories and mental flexibility. 5. Don't get too ...
Handedness in and of itself tends to be a grey area. The requirements for someone to be right- as opposed to left-handed have been debated, and because individuals who identify as left-handed may also use their right hand for a large number of tasks, identifying two clearcut groups of subjects is a challenging task.
Left-Handed People Predominate in Western Countries. Whereas countries in Asia and the Middle East have around a 6% rate of left-handedness, Western nations come in at 13%.
Also, naturally left-handed musicians have to play with right-handed-only instruments (violin, viola, cello). Kurt Cobain, frontman of Nirvana, was naturally ambidextrous. He grew up having a slight preference for his left-hand (as can be seen in many of his childhood photographies), but as an adult he wrote right-handed.