In a study led by Kathrin Müsch, with collaborators Kean Ming Tan, @khimberger and @DrValiante , we recorded intracranially while people listened to sentences and then silently rehearsed them. /2
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A new preprint from our lab asks: how do we mentally replay sequences of words? Does mental replay involve replay of the neural dynamics from the original perception? https://www.biorxiv.org/content/early/2018/09/16/419358 … . 1/pic.twitter.com/6oc3BU5MK8
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We found that prefrontal and temporoparietal activity looked similar across perception and rehearsal of the same sentence. In these “higher order” areas, responses were sluggish in time and were sensitive to sentence semantics. /3
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But in sensorimotor and premotor cortex we saw something different. In these areas, we observed large, short-latency, sentence-specific responses during listening, and these switched to a distinct (still sentence-specific) pattern when mentally replaying the sentence . /4
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The sensorimotor and premotor cortex may provide an “audio motor interface”, thought to be critical for our short-term memory of sequences of words. 5/
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