When the scans were studied and the results were tallied, it appeared that both sexes were actually able to lower the overall sensation of hunger. In most people, the brain may grow partially habituated to an empty belly over time, and all of Wang's volunteers did a good job of hastening that desensitization. What the men could do that the women couldn't was quit ruminating on food, successfully suppressing — if only temporarily — the conscious desire to eat. The women continued experiencing emotional cravings even if their hunger had subsided.
Wang suspects hormone may play a part in the difference. Link -Thanks, Freshome!
(image credit: Ansgar/zefa/Corbis)