时差N小时 你听到过颜色吗?(下)（在线收听）

Scientists know very little about what causes synesthesia.

科学家对于“共感现象”的起因知之甚少。

While it appears to be hereditary, the actual neurological processes that account for the phenomenon remain a mystery.

虽然这种疾病看似遗传，但实际上如何解释这种现象的神经发生过程依然成谜。

Although most scientists agree that the hippocampus, an area of the brain responsible for memory, plays a role, exactly how the hippocampus might cause synesthesia is not clear.

尽管多数科学家们都认为大脑控制记忆的区域——“海马体”是导致此现象出现的原因，但它如何影响并引发“共感”症状尚不清楚。

Otherwise, scientific knowledge about synesthesia is limited to several interesting observations.

另外，目前对“共同感觉”的科学认识仅基于几种有趣的现象观察。

For example, synesthetic perceptions remain consistent over time.

比如，这种“共同感觉”的感知会随着时间保持一致。

In other words, if a person with synesthesia sees blue and green flashes when he hears a C-sharp, he will always see those same colors upon hearing that note.

也就是说，如果一个人听到C大调时看到蓝色与绿色闪过，那么只要他再听到这一声音，眼前会浮现蓝色和绿色。