"With stroke survivors, it's very important that they get signals to the brain but also that they send signals downwards from the brain," he says.

“对于中风幸存者，大脑能接收信号而后把信号传给下肢，这是很重要的，”他说。

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But also negative because we are going downwards.

不过也带有负号，因为这是向下的。

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