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I ricercatori dell’Università di Yale hanno individuato i neuroni nel cervello dei topi che, se stimolati, spingono ad abbuffarsi. Lo studio, pubblicato sulla rivista dell’Associazione americana per l’avanzamento della scienza, si è concentrato sull’area del cervello chiamata “zona incerta” e ha osservato che una stimolazione prolungata nel tempo conduce ad un aumento di peso.
Gli studiosi Xiaobing Zhang e Anthony N. van den Pol hanno rilevato che dopo dieci minuti di stimolazione continua dei neuroni della zona incerta, i topi consumavano rapidamente il 35% del cibo ad alto contenuto di grassi che normalmente consumano in 24 ore.
Ripetendo la stimolazione per cinque minuti ogni tre ore, nel giro di due settimane i topi hanno cominciato a magiare molto più del normale, aumentando di peso. Quando la stimolazione è stata interrotta, i topi hanno ridotto la quantità di cibo mangiato.
ANSA/eb
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