Well, a new study in the journal Cell says you can thank your amygdala for that. Because this key member of the brain’s fear circuitry can directly sense suffocation, and trigger feelings of terror.

根据《细胞》杂志所说，这种情绪的涌现都是扁桃体的错，因为这个大脑恐惧线路的关键的小东西可以感知窒息状态并触发恐惧情绪。

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Because this key member of the brain's fear circuitry can directly sense suffocation, and trigger feelings of terror.

因为大脑中的这个“恐惧中枢”还能够直接感应到人体的窒息，并促使人们产生警觉。

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Mr Musharraf, a key ally of the US President George Bush's "war on terror", stepped down last week after nine years in power to avoid being impeached.

BBC: Pakistan judges' deadline looms

As security minister, he was among key officials who oversaw the incursion of Kenyan forces into neighboring Somalia to battle the terror group, Al-Shabaab.

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