The effects of pitch and pitch strength on an auditory-evoked N1m.
The aim of this paper was to determine whether the latency and/or amplitude of the N1m deflection of the auditory-evoked magnetic fields are influenced by the delay and number of iterations of iterated rippled noise, which are related to pitch and pitch strength, respectively. The results indicate that the N1m amplitude decreased sharply for delays between 16 and 32 ms, suggesting that the N1m amplitude reflects the lower limit of the audible pitch range. The N1m latency increases with increasing delay of up to 8-16 ms and then decreases again for delays longer than 16 ms. The behavior of the latency may reflect the balance between the pitch-related component of the N1m and a specific pitch-unrelated component.
Soeta
Yoshiharu
Y
Institute for Human Science and Biomedical Engineering, National Institute of Advanced Industrial Science and Technology , Midorigaoka, Ikeda, Osaka, Japan. y.soeta@aist.go.jp
Nakagawa
Seiji
S
D000161:Acoustic Stimulation; D000328:Adult; D001303:Auditory Cortex / Q000502:physiology*; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D006801:Humans; D009622:Noise; D010898:Pitch Perception / Q000502:physiology*