The neural basis of imaginary vocalization: an MEG study

摘要

To explore the neural basis of vocalization, we measured visual evoked magnetic fields (VEFs) related to time-locked imaginary articulation using magnetoencephalography (MEG). We demonstrated a unique procedure, synchronized auditory stimulus with visually presented movies, and made comparisons before and after the auditory presentations. Since MEG measurements have high temporal resolution, we used visual stimuli with subjects to have the timing of silent articulation, and subtracted responses from each other. With this paradigm, the brain activities of the right temporal region at the latency around 160 ms were detected and supposed to relate the initial brain activity of word generation.