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Proceedings Paper

Study of the left prefrontal cortex activity of Chinese children with dyslexia in phonological processing by NIRS
Author(s): Zhili Zhang; Ting Li; Yi Zheng; Qingming Luo; Ranran Song; Hui Gong
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Paper 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.

Paper Details

Date Published: 22 February 2006
PDF: 6 pages
Proc. SPIE 6078, Photonic Therapeutics and Diagnostics II, 607833 (22 February 2006); doi: 10.1117/12.648771
Show Author Affiliations
Zhili Zhang, Huazhong Univ. of Science and Technology (China)
Ting Li, Huazhong Univ. of Science and Technology (China)
Yi Zheng, Huazhong Univ. of Science and Technology (China)
Qingming Luo, Huazhong Univ. of Science and Technology (China)
Ranran Song, Huazhong Univ. of Science and Technology (China)
Hui Gong, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 6078:
Photonic Therapeutics and Diagnostics II
Kenton W. Gregory; Guillermo J. Tearney; Nikiforos Kollias; Haishan Zeng; Bernard Choi; Reza S. Malek; Michael D. Lucroy; Lloyd P. Tate; Henry Hirschberg; Steen J. Madsen; Brian Jet-Fei Wong; Justus F. R. Ilgner; Eugene A. Trowers; Werner T.W. de Riese, Editor(s)

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