@article{oai:repo.qst.go.jp:00043390,
 author = {Chen, Weizhong and Zhang, Tong and Fengtong, Wang and Kokubo, Hideyuki and Yamamoto, Mikio and 陳 偉中 and 山本 幹男},
 issue = {2},
 journal = {Journal of International Society of Life Information Science},
 month = {Sep},
 note = {Hemoglobin concentration change of cerebral cortex during Qigong has been studied by the relatively new technique multi-channel near-infrared spectroscopy (NIRS). We measured concentration change for six Qigong experts and twelve normal controllers using NIRS instruments from two makers. We analyzed the left frontal area (Fp1) and found the oxygenated hemoglobin and total hemoglobin concentrations of cerebral cortex during Qi-emission task were of two types, compared to the control task. Both concentrations had statistically significant increase (p<0.01) for three Qigong experts and decrease (p<0.01,both concentrations) for three others. Moreover, there was statistical significance (p<0.01, both concentrations) between Qigong experts and normal controllers. These results agreed with results of a previous report that observed and analyzed the right frontal area (Fp2). One Qigong expert also showed a strong correction (r=0.94) between oxygenated hemoglobin concentraion change and respiration frequency during a Qi-emission task. The specialized breath control could influence blood volume of the cerebral cortex.},
 pages = {473--485},
 title = {Change of Hemoglobin Concentration of Cerebral Cortex and Respiration Frequency during Qi-emission Task},
 volume = {21},
 year = {2003}
}