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Maschi alfa si diventa: ad "accendersi" è un circuito specifico nel cervello, secondo uno studio dello Shanghai Institutes for Biological Sciences della Chinese Academy of Sciences, pubblicato sulla rivista statunitense Science.
Gli studiosi hanno preso in esame dei topi, per capire il ruolo della corteccia prefrontale dorsomediale, che risultava già implicata nella dominanza sociale. Esemplari maschi sono stati inseriti in un tubo e dovevano affrontarsi a vicenda. I ricercatori hanno registrato quanto fossero impegnati a tenere atteggiamenti, come iniziare a spingere, resistere, ritirarsi o fermarsi.
È stato così individuato un particolare sottoinsieme di neuroni che diventavano più attivi durante i comportamenti dominanti. Successivamente questo sottogruppo di neuroni è stato inibito con un farmaco e nel giro di poche ore i roditori risultavano meno impegnati in comportamenti come spinte - che denotano dominanza - e maggiormente nei ritiri.
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