title: No effect of gender on tonal and phonetic mismatch negativity in normal adults assessed by a high-resolution EEG recording.
abstract: The auditory mismatch negativity (MMN) of event-related potential components has been widely used to assess the ability of auditory automatic change discrimination of verbal and nonverbal stimuli in healthy individuals and patients with various illnesses. To clarify the role of gender differences in the MMN, we compared the amplitude, latency, and topography of tonal and phonetic MMN between healthy males and females, using a high-density (128 channel) electroencephalography montage. The MMN was evaluated in 18 right-handed male and ten age-matched female adults. The MMN in response to a duration change of pure tone and that in response to a phonetic change (Japanese vowel /a/ versus /o/ with 150-ms duration) were recorded. There were no significant differences in amplitude, latency, or laterality for either tonal or phonetic MMN between male and female subjects. This lack of evidence for effects of gender on MMN in response to duration change of tones or that in response to changes of phonemes with a short duration in normal adults may be of relevance to a growing number of researchers who are studying the MMN in healthy individuals and various clinical groups.
authors.affiliation: Department of Neuropsychiatry, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8655, Tokyo, Japan. kasaik@bwh.harvard.edu
authors.forename: Kiyoto
authors.initials: K
authors.lastname: Kasai
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Nakagome
authors.forename: Akira
authors.initials: A
authors.lastname: Iwanami
authors.forename: Masato
authors.initials: M
authors.lastname: Fukuda
authors.forename: Kenji
authors.initials: K
authors.lastname: Itoh
authors.forename: Ichiro
authors.initials: I
authors.lastname: Koshida
authors.forename: Nobumasa
authors.initials: N
authors.lastname: Kato
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D001307:Auditory Perception / Q000502:physiology*; D001931:Brain Mapping; D004569:Electroencephalography; D005071:Evoked Potentials; D005072:Evoked Potentials, Auditory; D005260:Female; D006801:Humans; D008297:Male; D010700:Phonetics; D012016:Reference Values; D012727:Sex Characteristics; D013061:Speech Acoustics; D013067:Speech Perception / Q000502:physiology*