Dipole Tracing of N₁ and P₂ Component in Slow Vertex Response

Abstract

Using dipole tracing method, we investigated N₁ component of slow vertex response. In 24 adults with normal hearing, 78 waveform showed reasonable results.
We classified the location of the dipoles into 5 patterns and examined the tendency where these dipoles existed. 96.2% of the dipoles existed in the midline or lateral portion.
The dipole of N₁ component mainly located in the lateral portion. Hewever, some results showed that the dipoles of N₁ located in around the midline.
We considered that the origins of N₁ component are in three or more portions, and two of them exist in the bilateral auditory cortex.