Table I.
Response patterns (oxy‐Hb signal changes) in the infant cortex during audio‐visual presentations
| Studies | Present study | Watanabe et al. [2008] | |||||
|---|---|---|---|---|---|---|---|
| Stimuli | Sound‐object | No‐sound | Sound‐object | No‐object | |||
| Video image Sound | Mobile Mobile | Mobile · | Mobile Mobile | Checkerboard Mobile | |||
| No. of Ch | Regions | ||||||
| L24 | STG (early auditory) | + | > | − | + | + | |
| L22 | MTGa | + | > | +/− | + | + | |
| L2 | MOG (early visual) | + | > | + | + | + | |
| L10 | MOG (LO) | + | + | + | > | · | |
| L17 | MTGp | + | > | + | + | > | + |
| L18 | IPL | + | > | + | + | > | + |
| L36 | IFG | + | + | + | > | + | |
| L44 | SFG | + | > | · | + | > | · |
Notes: The results of the present and previous studies (Watanabe et al. 2008) that used mulitchannel NIRS are summarized in this table. In both the present and previous studies, mobile objects with the sound of ringing bells produced by the moving mobiles were presented. In order to compare the effects of the sound‐objects presentation, the no‐sound stimuli (in the present study) and the no‐object stimuli (the checkerboard pattern reversal in the previous study) were presented. “Ch” means measurement channel. The characters “+”, “‐”, and “.” indicate significant activation, significant deactivation, and non‐significant response, respectively. The “+” and “‐” characters for the MTGa region in the present study indicate activation in the early time windows and deactivation in the late time windows. The inequality sign (“>”) indicates the results of the direct comparisons between the 2 conditions in each study.