They change attitude, emotional state, and pain perception.

他们改变了态度，情绪状态和疼痛感。

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It turns out that being in love can actually dull pain perception.

研究证明在爱情中能够减少疼痛感。

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For instance, does gender have influence on pain perception and how we feel pain?

例如性别对痛觉是否有影响，我们如何感知疼痛？

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Narcotics,the most powerful drugs currently available to fight pain, simply dull the brain's perception of it.

VOA: standard.2010.05.04

But all these medications do is dull the brain's perception of pain.

VOA: standard.2010.05.04

And consider the role perception plays in helping patients improve in ailments ranging from pain and depression to Parkinson's disease through a phenomenon known as the placebo effect.

CNN: The power of perceptions: Imagining the reality you want

Dr Breslin and his colleagues want to find out how genes influence human perception, particularly the senses of smell and taste and those (warmth, cold, pain, tingle, itch and so on) that result from stimulation of the skin.

ECONOMIST: Twin research