The same wavelength: how language stimulates the brains of speakers and listeners in similar ways. Prof. Uri Hasson of Princeton, a philosophy undergraduate major, studies the complexity of understanding with imagination and magnetic resonance imaging. From the article:

On average, the listener’s brain responses mirrored the speaker’s brain responses with some time delays. The delays matched the flow of information, implying a causal relationship in which the speaker’s words shaped the responses in the listener’s brain.

In addition, the analysis also identified a subset of brain regions in which the activity in the listener’s brain preceded the activity in the speaker’s brain, suggesting that the listeners were actively predicting the speaker’s upcoming utterances. And the ability to predict speech may also be tied to how well people understand each other, Hasson said.

h/t Mind Your Brain