PITCH glides of a continuous tone elicit auditory N1-like responses. Howeve
r, their characteristics have not well been investigated, and it remained u
nclear whether the response is an auditory true N1 or the mismatch negativi
ty (MMN). We found here that a rapid pitch glide activates almost the same
response as a true N1. On the contrary, as the rate of the pitch glide decr
eases, the response continuously varies the characteristics from true N1 to
MMN. This suggests that there would exist intermediate responses between a
uditory N1 and MMN. NeuroReport 10:2909-1912 (C) 1999 Lippincott Williams &
Wilkins.