Study of the left prefrontal cortex activity of Chinese children with dyslexia in phonological processing by NIRS

Zhili Zhang; Ting Li; Yi Zheng; Qingming Luo; Ranran Song; Hui Gong

doi:10.1117/12.648771

22 February 2006 Study the left prefrontal cortex activity of Chinese children with dyslexia in phonological processing by NIRS

Zhili Zhang, Ting Li, Yi Zheng, Qingming Luo, Ranran Song, Hui Gong

Author Affiliations +

Proceedings Volume 6078, Photonic Therapeutics and Diagnostics II; 607833 (2006) https://doi.org/10.1117/12.648771
Event: SPIE BiOS, 2006, San Jose, California, United States

Abstract

Developmental dyslexia, a kind of prevalent psychological disease, represents that dyslexic children have unexpected difficulties in phonological processing and recognition test of Chinese characters. Some functional imaging technologies, such as fMRI and PET, have been used to study the brain activities of the children with dyslexia whose first language is English. In this paper, a portable, 16-channel, continuous-wave (CW) NIRS instrument was used to monitor the concentration changes of each hemoglobin species when Chinese children did the task of phonological processing and recognition test. The NIRS recorded the hemodynamic changes in the left prefrontal cortex of the children. 20 dyslexia-reading children (10~12 years old) and 20 normal-reading children took part in the phonological processing of Chinese characters including the phonological awareness section and the phonological decoding section. During the phonological awareness section, the changed concentration of deoxy-hemoglobin in dyslexia-reading children were significantly higher (p<0.05) than normal-reading children in the left ventrolateral prefrontal cortex (VLPFC). While in the phonological decoding section, both normal and dyslexic reading children had more activity in the left VLPFC, but only normal-reading children had activity in the left middorsal prefrontal cortex. In conclusion, both dyslexic and normal-reading children have activity in the left prefrontal cortex, but the degree and the areas of the prefrontal cortex activity are different between them when they did phonological processing.

Citation Download Citation

Zhili Zhang, Ting Li, Yi Zheng, Qingming Luo, Ranran Song, and Hui Gong "Study the left prefrontal cortex activity of Chinese children with dyslexia in phonological processing by NIRS", Proc. SPIE 6078, Photonic Therapeutics and Diagnostics II, 607833 (22 February 2006); https://doi.org/10.1117/12.648771

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