Latency of evoked neuromagnetic M100 reflects perceptual and acoustic stimulus attributes
作者:
Timothy Roberts,
Paul Ferrari,
David Poeppel,
期刊:
NeuroReport
(OVID Available online 1998)
卷期:
Volume 9,
issue 14
页码: 3265-3269
ISSN:0959-4965
年代: 1998
出版商: OVID
关键词: Categorical perception;Complex Tones;M100;Magnetoencephalography;Timing;Temporal encoding
数据来源: OVID
摘要:
THE latency of components of the auditory evoked neuromagnetic field has been shown to reflect, or encode, stimulus attributes. In particular, the M100 component, occurring ∼100 ms post stimulus onset has a latency that depends on stimulus pitch, spectral complexity and presentation level. This study used magnetoencephalography to record neuromagnetic fields evoked by presentation of two-tone complexes consisting of various proportions of 100 Hz and 1 kHz energy. These are perceived categorically, as evidenced by classification and reaction time measurements. It is found that the M100 latency also varies categorically, that is, characterized by two plateau regions with a sharp interface. Thus, we find that not only does the M100 latency reflect acoustic attributes of a stimulus, but also such perceptual characteristics.
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