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Boletín médico del Hospital Infantil de México
versão impressa ISSN 1665-1146
Resumo
POBLANO, Adrián; CASTRO-SIERRA, Eduardo; ARTEAGA, Carmina e PEREZ-RUIZ, Santiago J.. Lexical tonal discrimination in Zapotec children. A study of the theta rhythm. Bol. Med. Hosp. Infant. Mex. [online]. 2016, vol.73, n.2, pp.84-89. ISSN 1665-1146. https://doi.org/10.1016/j.bmhimx.2015.09.010.
Background:
Zapotec is a language used mainly in the state of Oaxaca in Mexico of tonal characteristic; homophone words with difference in fundamental frequency with different meanings. Our objective was to analyze changes in the electroencephalographic (EEG) theta rhythm during word discrimination of lexical tonal bi-syllabic homophone word samples of Zapotec.
Methods:
We employed electroencephalography analysis during lexical tonal discrimination in 12 healthy subjects 9-16 years of age.
Results:
We observed an increase in theta relative power between lexical discrimination and at rest eyes-open state in right temporal site. We also observed several significant intra- and inter-hemispheric correlations in several scalp sites, mainly in left fronto-temporal and right temporal areas when subjects were performing lexical discrimination.
Conclusions:
Our data suggest more engagement of neural networks of the right hemisphere are involved in Zapotec language discrimination.
Palavras-chave : Tonal-languages; Zapotec; Lexical tone discrimination; Electroencephalogram; Theta rhythm; Theta relative power.
