Why are some people left - handed ? An evolutionary
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References http://rstb.royalsocietypublishing.org/content/364/1519/881.full.html#ref-list-1 This article cites 158 articles, 22 of which can be accessed free Subject collections (541 articles) evolution (387 articles) behaviour Articles on similar topics can be found in the following collections Email alerting service here right-hand corner of the article or click Receive free email alerts when new articles cite this article sign up in the box at the top
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Why are some people left-handed? An evolutionary perspective.
Since prehistoric times, left-handed individuals have been ubiquitous in human populations, exhibiting geographical frequency variations. Evolutionary explanations have been proposed for the persistence of the handedness polymorphism. Left-handedness could be favoured by negative frequency-dependent selection. Data have suggested that left-handedness, as the rare hand preference, could represen...
متن کاملYour Left-Handed Brain
WHY ARE YOU LEFT-HANDED? Despite many years of research, the reason why one person turns out to be a left-hander and another does not remains a mystery. Handedness is partly heritable (see Glossary): left-handed parents tend to have more left-handed children than right-handed parents do. Studies that compared identical twins to fraternal twins (see Glossary) show that the heritability is around...
متن کاملپرده صماخ و چپ دستها T.M and left handed
ABCTRACT: To find out what percentage of the men are left-handed or as a rule use their left hand for writing or do precise or complicated jobs is to question them directly. Neurologists believe that less than 10 percent of people are left - handed. In our study, we should like to know the correct percentage of the men living in Rasht are left -handed . This study is statistically based on m...
متن کاملمقایسه معاینات پریودنتال دانشجویان دندانپزشکی راست دست و چپ دست در اندازهگیری عمق پاکت پریودنتال
Background and Aims: The precision of periodontal pocket measurements with periodontal probe is related to different factors. Some of these are related to examiner. The purpose of this study was to compare the right-handed and left-handed dental students in the measurement of periodontal pocket depth (PPD).Materials and Methods: Eight systemically healthy adult patients (mean age of 35 years) w...
متن کاملHandedness and Language Lateralization: Why Are We Right-handed and Left-brained?
Around 90% of humans prefer their right hand for unimanual actions and are lefthemisphere dominant for language functions; a pattern far from negligible. The phenomena of handedness and cerebral lateralization for language are presented along with the different theories that attempt to explain the presence of these functional asymmetries. The focus is on the adaptive advantages both on the indi...
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