Why are some people left-handed? An evolutionary perspective

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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...

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Why are some people left - handed ? An evolutionary

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 alert...

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Why are neurotransmitters neurotoxic? An evolutionary perspective

In the CNS, minor changes in the concentration of neurotransmitters such as glutamate or dopamine can lead to neurodegenerative diseases. We present an evolutionary perspective on the function of neurotransmitter toxicity in the CNS. We hypothesize that neurotransmitters are selected because of their toxicity, which serves as a test of neuron quality and facilitates the selection of neuronal pa...

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Why Are We Right Handed

ness for according to himself uncivilized man tends to the same practice. The wild aborigines in the Andaman Islands use their right hands for the actual discharge of the arrow from the bow. It is the same with semi-civilized races on the N. W. Frontier, in Somaliland, and elsewhere that I have observed. Let Ur. Jaensch more carefully observe an infant and he will see its pronounced tendency to...

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Handedness 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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ژورنال

عنوان ژورنال: Philosophical Transactions of the Royal Society B: Biological Sciences

سال: 2008

ISSN: 0962-8436,1471-2970

DOI: 10.1098/rstb.2008.0235