Cortical hemodynamic responses to degraded speech shows activation in right fronto-temporal cortex and Broca’s area

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Unfortunately, I am not able to have zoom open at the moment. Please feel free to ask questions in the comments section here or by email at: don.bell-souder@colorado.edu The effect of auditory signal distortion on sentence comprehension in the brain is not well understood. To examine this issue, we presented subjects with sentences either with their audio signal unaltered, or distorted in a manner meant to imitate Cochlear Implants (CI). Hemodynamic responses in the brain were then measured using fNIRS. We found that compared to sentences that were presented without distortion, the CI simulations evoked more activation from left and right fronto-temporal areas, and less activation from typical perisylvian language areas.

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