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Changes in oscillatory brain networks after lexical tone training.

Kaan E, Wayland R, Keil A - Brain Sci (2013)

Bottom Line: We compared native speakers of English (a non-tone language) and native speakers of Mandarin Chinese (a tone language), before and after a two-day laboratory training.Native English speakers showed a larger gamma-band power and stronger alpha-band synchrony across EEG channels than the native Chinese speakers, especially after training.This is compatible with the view that forming new speech categories on the basis of unfamiliar perceptual dimensions involves stronger gamma activity and more coherent activity in alpha-band networks than forming new categories on the basis of familiar dimensions.

View Article: PubMed Central - PubMed

Affiliation: Department of Linguistics, University of Florida, P.O. Box 115454, Gainesville, FL 32611, USA. kaan@ufl.edu.

ABSTRACT
Learning foreign speech contrasts involves creating new representations of sound categories in memory. This formation of new memory representations is likely to involve changes in neural networks as reflected by oscillatory brain activity. To explore this, we conducted time-frequency analyses of electro-encephalography (EEG) data recorded in a passive auditory oddball paradigm using Thai language tones. We compared native speakers of English (a non-tone language) and native speakers of Mandarin Chinese (a tone language), before and after a two-day laboratory training. Native English speakers showed a larger gamma-band power and stronger alpha-band synchrony across EEG channels than the native Chinese speakers, especially after training. This is compatible with the view that forming new speech categories on the basis of unfamiliar perceptual dimensions involves stronger gamma activity and more coherent activity in alpha-band networks than forming new categories on the basis of familiar dimensions.

No MeSH data available.


Related in: MedlinePlus

Mean spectral power in the gamma band (200–400 ms) for the three language groups, before (pre, upper row) and after training (post, bottom row), collapsed over tone and condition.
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brainsci-03-00757-f002: Mean spectral power in the gamma band (200–400 ms) for the three language groups, before (pre, upper row) and after training (post, bottom row), collapsed over tone and condition.

Mentions: The upper row in Figure 2 displays the mean gamma band power for the three language groups before training, collapsed over tone and condition. Means for lateral electrodes are given in Figure 1A. Spectral power in the gamma band was largest over left frontal-central sites. Gamma-band power was stronger in the native English participants compared to the Thai and Chinese groups, and for the Thai compared to the Chinese group (effect of language: lateral sites, F(1,28) =68.31, p < 0.001; midline sites, F(1,28) = 7.66, p < 0.001). Post-hoc comparisons showed that all groups differed significantly from each other (p < 0.001 at lateral sites; p < 0.05 at midline sites, Bonferroni corrected).


Changes in oscillatory brain networks after lexical tone training.

Kaan E, Wayland R, Keil A - Brain Sci (2013)

Mean spectral power in the gamma band (200–400 ms) for the three language groups, before (pre, upper row) and after training (post, bottom row), collapsed over tone and condition.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4061855&req=5

brainsci-03-00757-f002: Mean spectral power in the gamma band (200–400 ms) for the three language groups, before (pre, upper row) and after training (post, bottom row), collapsed over tone and condition.
Mentions: The upper row in Figure 2 displays the mean gamma band power for the three language groups before training, collapsed over tone and condition. Means for lateral electrodes are given in Figure 1A. Spectral power in the gamma band was largest over left frontal-central sites. Gamma-band power was stronger in the native English participants compared to the Thai and Chinese groups, and for the Thai compared to the Chinese group (effect of language: lateral sites, F(1,28) =68.31, p < 0.001; midline sites, F(1,28) = 7.66, p < 0.001). Post-hoc comparisons showed that all groups differed significantly from each other (p < 0.001 at lateral sites; p < 0.05 at midline sites, Bonferroni corrected).

Bottom Line: We compared native speakers of English (a non-tone language) and native speakers of Mandarin Chinese (a tone language), before and after a two-day laboratory training.Native English speakers showed a larger gamma-band power and stronger alpha-band synchrony across EEG channels than the native Chinese speakers, especially after training.This is compatible with the view that forming new speech categories on the basis of unfamiliar perceptual dimensions involves stronger gamma activity and more coherent activity in alpha-band networks than forming new categories on the basis of familiar dimensions.

View Article: PubMed Central - PubMed

Affiliation: Department of Linguistics, University of Florida, P.O. Box 115454, Gainesville, FL 32611, USA. kaan@ufl.edu.

ABSTRACT
Learning foreign speech contrasts involves creating new representations of sound categories in memory. This formation of new memory representations is likely to involve changes in neural networks as reflected by oscillatory brain activity. To explore this, we conducted time-frequency analyses of electro-encephalography (EEG) data recorded in a passive auditory oddball paradigm using Thai language tones. We compared native speakers of English (a non-tone language) and native speakers of Mandarin Chinese (a tone language), before and after a two-day laboratory training. Native English speakers showed a larger gamma-band power and stronger alpha-band synchrony across EEG channels than the native Chinese speakers, especially after training. This is compatible with the view that forming new speech categories on the basis of unfamiliar perceptual dimensions involves stronger gamma activity and more coherent activity in alpha-band networks than forming new categories on the basis of familiar dimensions.

No MeSH data available.


Related in: MedlinePlus