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Those who drank blueberry juice showed a "significant improvement on learning and memory tests", scientists said.

科学家说，已经证明喝蓝莓汁饮料的人“明显地改善了学习与记忆测试成绩。”

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Scientists gave the treated mice learning and memory tests and then examined their brains for evidence of the disease.

科学家对这些小鼠进行学习和记忆力测试，之后检查大脑寻找患该病的证据。

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They also showed that injecting normal mice with extra ghrelin increased the number of synapses in the hippocampus - and improved the animals' performance in several learning and memory tests.

BBC: NEWS | Health | Hunger pangs 'may trigger memory'