Time-resolved hemodynamic responses to sentence-level speech perception, production, and self-monitoring

Description

Teng Ieng Leong and a team of co-authors recorded brain activity continuously. Thirty-one volunteers listened to English sentences and then said them aloud. That combination normally ruins scanner data through noise and head movement. Their method separated each scan into independent components and matched their timing to the stages of hearing, planning, and speaking.

Activity centered on the superior temporal cortex, the inferior frontal region, and the face and mouth movement areas. Subtracting the listening-only pattern from the listen-then-speak pattern exposed a second wave of response in the hearing cortex tied to one's own voice, the self-monitoring signal. The team also pinned down how each component's blood-flow response rose and fell relative to the spoken words. They offer the framework for future studies of natural speech, where hearing and producing language interleave.

Catalog record

Source: https://europepmc.org/article/MED/PMC13595370