14 mars 2017

Pourquoi sommes-nous droitiers ou gauchers?

Extrait de la nouvelle:

According to a brand new study in the journal eLife, however, it is definitively nothing to do with our brains or our neurological development. In a rather satisfying plot twist, it seems that your left- or right-handedness is actually ingrained in your biological workings from before you were born, but in the form of a particular hubbub of gene activity in the spine, not the brain.

“Our data suggest a spinal, not a cortical, beginning of hemispheric asymmetries,” the team announced in their paper.

(...) Moreover, the team actually found out what was causing this symmetry. As it so happens, it’s not influenced by regular, inherited genetic mutations or traits, but by environmental factors – influences that are affecting the baby as it grows in the womb.



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