Only when the long ban on dissection petered out in the Renaissance did the ventricles prove to be so much empty space — poke the brain around a little, and they collapse and disappear.

当针对解剖的长期禁令在文艺复兴时代解除以后，人们发现心室竟然是中空的——而大脑只要受到一点损伤，心室就会彻底瓦解和静止。

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But while the danger is well known to shoppers who venture out on an empty stomach, how the problem arises in the brain has remained a mystery.

但是那些空腹就出门的购物者都知道面临的危险是什么，但却不知道饥饿会对大脑产生什么样的问题。

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Everything, 'he repeated, with the emphasis of an empty brain.

“都齐了。”紧接着的这再次重复更加明显地暴露出此刻他头脑的空空如也。

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Last week, the internet was grumbling about a series of tweets that Microsoft Studios Creative Director decided to empty from his brain onto the screens of millions.

FORBES: Adam 'Always On' Orth No Longer with Microsoft

The hypothalamus reacts to ghrelin, a hormone excreted by an empty stomach, by releasing appetite-stimulating neurotransmitters into other parts of the brain.

FORBES: Health

They showed part of the brain thought to be involved in "food appeal", the orbitofrontal cortex, became more active on an empty stomach.

BBC: Skipping breakfast primes the brain to seek out fat