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Your verbal questions beginning with 'what' will rapidly deactivate the left prefrontal cortex of listeners
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Your verbal questions beginning with 'what' will rapidly deactivate the left prefrontal cortex of listeners
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Journal Article
Your verbal questions beginning with 'what' will rapidly deactivate the left prefrontal cortex of listeners
2021
Overview
The left prefrontal cortex is essential for verbal communication. It remains uncertain
at what timing, to what extent, and what type of phrase
initiates left-hemispheric dominant prefrontal activation during comprehension of spoken sentences. We clarified this issue by measuring event-related high-gamma activity during a task to respond to three-phrase questions configured in different orders. Questions beginning with a
wh-
interrogative
deactivated
the left posterior prefrontal cortex right after the 1st phrase offset and the anterior prefrontal cortex after the 2nd phrase offset. Left prefrontal high-gamma activity augmented subsequently and maximized around the 3rd phrase offset. Conversely, questions starting with a concrete phrase deactivated the right orbitofrontal region and then
activated
the left posterior prefrontal cortex after the 1st phrase offset. Regardless of sentence types, high-gamma activity emerged earlier, by one phrase, in the left posterior prefrontal than anterior prefrontal region. Sentences beginning with a
wh-
interrogative may initially deactivate the left prefrontal cortex to prioritize the bottom-up processing of upcoming auditory information. A concrete phrase may obliterate the inhibitory function of the right orbitofrontal region and facilitate top-down lexical prediction by the left prefrontal cortex. The left anterior prefrontal regions may be recruited for semantic integration of multiple concrete phrases.
