Monthly Archive

Worth Repeating: The Rights and Reasons of Left-Handedness

Source: Irish Medical Times
Summary: Dr David McNamara and Dr Hugo Van Odyck of Saint John of God Hospital, Stillorgan, examine the causes and consequences of growing up left-handed
As specialists in the field of child and adolescent psychiatry, the developmental perspective assumes a great importance in the science of our discipline. We have been struck by the impact of left-handedness on many aspects of life and take this opportunity to inform the right-biased world.
It is believed that approximately 13 per cent of people are left-handed. The majority of the population are also right-sided, in general (that is, they prefer to use the right eye, right foot and right ear if forced to make a choice between the two).  
The reasons for this are not fully understood, but it is thought that because the left cerebral hemisphere of the brain controls the right side of the body, the right side is generally stronger. It is suggested that the left cerebral hemisphere is dominant over the right in most humans, because in approximately 90 per cent of all humans, the left hemisphere is the ‘language’ hemisphere.
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