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Right hemispheric predominance in the segregation of mistuned partials
Author(s) -
Hiraumi Harukazu,
Nagamine Takashi,
Morita Takeshi,
Naito Yasushi,
Fukuyama Hidenao,
Ito Juichi
Publication year - 2005
Publication title -
european journal of neuroscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.346
H-Index - 206
eISSN - 1460-9568
pISSN - 0953-816X
DOI - 10.1111/j.1460-9568.2005.04350.x
Subject(s) - magnetoencephalography , harmonics , sound (geography) , acoustics , tone (literature) , harmonic , right hemisphere , audiology , physics , mistuning , neuroscience , psychology , vibration , medicine , electroencephalography , art , literature , quantum mechanics , voltage
To elucidate the central mechanisms of sound segregation, we compared responses to a harmonic sound and a mistuned sound using a whole‐head magnetoencephalography system. The harmonic sound was composed of a 200‐Hz tone and its 2nd to 12th harmonics. The mistuned sound had, instead of the 600‐Hz harmonic, a 696‐Hz tone. In the right hemisphere, the amplitude of N100m responses evoked by the mistuned sound was significantly larger and the peak latency significantly longer than that evoked by the harmonic sound, suggesting that the right hemisphere plays a more important role than the left in detecting mistuned partials.