Perspectivas filogenéticas del uso de la mano, asimetría cerebral y capacidad de lecto-escritura
Answers generated after questioning about the origin of man will permit to speculate to where evolution of man is addressed. The major evolution steps that separate human primates from non-human primates can be described among many others by an efficient memory to use tools, dominance for hand us...
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| Publicado en: | Revista Médica Universitaria |
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| Autores principales: | , , |
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| Acceso en línea: | https://bdigital.uncu.edu.ar/fichas.php?idobjeto=3740 |
| Sumario: | Answers generated after questioning about the origin of man will permit to speculate
to where evolution of man is addressed. The major evolution steps that separate
human primates from non-human primates can be described among many
others by an efficient memory to use tools, dominance for hand use and opposition
of thumb, and language. Recently it has been described a gene, HSR (Hand Skill
Relative) that expresses for the dominance of right hand, cognitive abilities related
to language, and brain asymmetry in humans. This gene is imprinted, i.e. it is inherited
as parental origin and its expression is regulated by epigenetic factors.
These factors modify the expression of the gene without altering the primary structure
of DNA. In a population of school children of La Rioja province the HSR gene
has been studied in two regions of the province (Region 1 and Region 2). Results so
far obtained showing an altered proportion of the phenotypic expression of the gene
in Region 2, support the idea that an environmental factor should be conditioning
the epigenotype of the HSR gene. It is thought that the study of the regulatory
mechanisms of these genes recently appeared in the evolution could provide information
to where the evolution of man is projected into the future.
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