Fig. 1.
Repetition of monosyllabic words in a representative subject. (A) Event-related spectral perturbations (ERSPs), averaged across trials, and locked to the onset of auditory word stimulus. Cortical activation indexed by power increases in high frequencies is first apparent in STG during word perception, subsequently in Broca’s area, and finally extends to motor cortex during word production (vertical lines mark mean articulation onset). (B) High-frequency power (γhigh, 70–150 Hz) traces, averaged across trials, and locked to word stimulus onset are shown for STG (blue), Broca (green), and Motor (red) electrodes. The first electrode in every pair is marked by a black circle and corresponds to the ERSP plotted on the left. The shaded gray area marks the distribution of articulation onset for this subject (1 SD in each direction).