The global field power (RMS) for the average Auditory Evoked Field. AEF response was evoked with 120, 1 kHz pure tones. M100 response was observed in both hemispheres. There was no hemispheric difference for amplitude. However, there was a hemispheric difference for latency; mainly, the right hemisphere processed tones on average 9.5 msec faster than the left hemisphere. Standard Error (±) shown in dashed line.