Language prediction mechanisms in human auditory cortex

K. J. Forseth, G. Hickok, P. S. Rollo and N. Tandon ()
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K. J. Forseth: McGovern Medical School
G. Hickok: University of California
P. S. Rollo: McGovern Medical School
N. Tandon: McGovern Medical School

Nature Communications, 2020, vol. 11, issue 1, 1-14

Abstract: Abstract Spoken language, both perception and production, is thought to be facilitated by an ensemble of predictive mechanisms. We obtain intracranial recordings in 37 patients using depth probes implanted along the anteroposterior extent of the supratemporal plane during rhythm listening, speech perception, and speech production. These reveal two predictive mechanisms in early auditory cortex with distinct anatomical and functional characteristics. The first, localized to bilateral Heschl’s gyri and indexed by low-frequency phase, predicts the timing of acoustic events. The second, localized to planum temporale only in language-dominant cortex and indexed by high-gamma power, shows a transient response to acoustic stimuli that is uniquely suppressed during speech production. Chronometric stimulation of Heschl’s gyrus selectively disrupts speech perception, while stimulation of planum temporale selectively disrupts speech production. This work illuminates the fundamental acoustic infrastructure—both architecture and function—for spoken language, grounding cognitive models of speech perception and production in human neurobiology.

Date: 2020
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DOI: 10.1038/s41467-020-19010-6

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