Abstract
The tonotopic organization of the human auditory cortex has been investigated using the auditory evoked potentials. 21-ch auditory evoked potentials from 5 normal adults were collected after monaural tone burst stimuli of 500, 1000, 2000, and 4000Hz were given.
Increasing stimulus frequency resulted in a decrease in N1 amplitude and an associated decrease in N1 latency.
The equivalent dipoles for N1 were estimated using the dipole tracing method. The dipoles located in the contralateral temporal lobes or near the thalamus. The dipoles of the contralateral temporal lobes located deeper in the lateral portion with increasing frequencies. Our results were similar to the findings of previous investigators who support the tonotopic organization.
