Circulatory basis of fMRI signals: relationship between changes in the hemodynamic parameters and BOLD signal intensity. - Akitoshi Seiyama; Junji Seki; Hiroki C. Tanabe; Ichiro Sase; Akira Takatsuki; Satoru Miyauchi; Hideo Eda; Shigeru Hayashi; Toshihide Imaruoka; Takeo Iwakura; Toshio Yanagida (NeuroImage, 2004)