Working with one's head causes a sensation of hunger quite as much as muscular work.
脑力劳动与体力劳动引起的饥饿感觉是完全一样的。
《新英汉大辞典》
2
Hunger is a complex sensation, but it is determined in part by neurons located in the hypothalamus, which send signals to the brain telling it that you're either hungry or sated.