瘙痒和挠痒有什么科学依据吗?_BEC初级作文

瘙痒和挠痒有什么科学依据吗?

Instead, itching and scratching engage brain areas involved not only in sensation, but also in mental processes that help explain why we love to scratch: motivation and reward, pleasure, craving and even addiction. What an itch turns on, a scratch turns off — and scratching oneself does it better than being scratched by someone else. The study results were published in December in the journal PLOS One.

与人们的期望相反，瘙痒和挠痒不仅与脑部感觉区有关，还涉及了某些心理过程，譬如：动机和奖赏、愉悦、渴求乃至成瘾等，这就从一定程度上解释了人们喜欢挠痒的原因。挠痒可以关闭那些被瘙痒激活的脑部活动，而且，自己挠痒痒的效果往往优于别人代劳。这些研究结果发表在12月的《公共科学图书馆：综合》杂志(PLOS One)上。

Itching was long overshadowed by pain in both research and treatment, and was even considered just a mild form of pain. But millions of people suffer from itching, and times have changed. Research has found nerves, molecules and cellular receptors that are specific for itching and set it apart from pain, and the medical profession has begun to take it seriously as a debilitating problem that deserves to be studied and treated.

长期以来，无论是在研究领域还是治疗领域，瘙痒作为一个课题总是被另一个课题——疼痛抢尽了风头，甚至，人们一度以为瘙痒只是疼痛的一种较为温和的形式。然而，全球遭受瘙痒之苦的患者已达数百万之多，时代也已经发生了变迁。研究发现，瘙痒具有其特异性的神经、分子和细胞受体，这将它与疼痛区分开来。医学界已经认识到瘙痒也可以削弱人的身体，并开始将其作为一个值得研究和治疗的问题认真对待。

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