志愿者们在几分钟后再次握紧这个球，然后尽可能地把单词回忆起来。

One group used their right hand on both occasions, another their left. A third group clenched their right fist ahead of memorising and their left ahead of recall and a fourth did the reverse.

其中一个小组两次都用的右手，另一个小组两次都用左手。第三个小组在记单词前握紧右拳，在回忆前握紧左拳，第四个小组与其正相反。

A fifth group held the ball but did not squeeze it.

第五个小组握着球但没有挤压它。

Those who squeezed with their right hand, followed by their left, remembered the most words.

那些先用右手紧握、然后用左手紧握的人回忆起来的单词最多。

The next best were the volunteers who made a fist with their right hand both times, while those who didn’t squeeze at all did better than those who led with their left.

仅次于他们的是那些两次都握紧右拳的志愿者，而那些两次都没握紧拳头的人表现比那些两次都握紧左拳的人要好。

It is thought that the movement of clenching the right fist activates a brain region that is involved in storing memories, while squeezing the left hand triggers an area that is key to retrieving information.

研究人员认为，握紧右拳的动作激活了和储存记忆相关的大脑区域，而握紧左拳的动作激活了大脑中与回忆信息相关的关键区域。

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