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Updated: Sep 28, 2025
Infant Auditory Processing and Event-related Brain Oscillations
Published on: July 1, 2015
Infants' Hemodynamic Modulation in the Temporal Region
Yuki Tsuji1, So Kanazawa2, Masami K Yamaguchi3
1Research and Development Initiative, Chuo University, Tokyo, Japan.
Insights
Eight-month-old infants show hemodynamic responses in the right occipitotemporal region during "Peekaboo." Repeated "Peekaboo" play modulated these responses, particularly with longer delays.
Area of Science:
- Neuroscience
- Developmental Psychology
- Infant Cognition
Background:
- Infant temporal regions respond to faces.
- Prior studies indicate
- Peekaboo
- modulates infant neural activity and hemodynamic responses.
- Hemodynamic modulation in the infant temporal region by repeated
- Peekaboo
- presentation has not been previously demonstrated.
Purpose of the Study:
- To investigate if repeated
- Peekaboo
- play modulates hemodynamic responses in the temporal region of 8-month-old infants.
- To compare temporal region activity between early and late
- Peekaboo
- trials with varying delay durations.
Main Methods:
- Utilized functional near-infrared spectroscopy (fNIRS) to measure hemodynamic responses.
- Compared activity in the temporal region between early and late
- Peekaboo
- trials.
- Introduced both long and short delays before face presentation.
Main Results:
- Oxy-hemoglobin concentration in the right occipitotemporal region (Ch 21) increased post-
- Peekaboo
- presentation compared to baseline in both delay conditions.
- Hemodynamic modulation in the right occipitotemporal region was observed in response to repeated
- Peekaboo
- presentations, specifically under the long delay condition.
Conclusions:
- Repeated
- Peekaboo
- play induces hemodynamic modulation in the infant right occipitotemporal region.
- The timing of face presentation (delay duration) influences this hemodynamic modulation.
Abstract:
This study examined whether 8-month-old infants' hemodynamic responses in the temporal region were modulated by repeated presentation of "Peekaboo" by using functional near-infrared spectroscopy (fNIRS). Previous studies have shown that infants' temporal region responds to faces (e.g., Otsuka et al., 2007). A recent electroencephalography study showed that the neural activity of infants was modulated by repeated presentation of "Peekaboo." Some fNIRS studies also revealed that the movie of "Peekaboo" activated the hemodynamic response of the temporal region in infancy. However, no studies have shown the hemodynamic modulation of the temporal region according to the repeated presentation of "Peekaboo" in infants. In order to examine whether the hemodynamic responses of the temporal region were modulated by repeated presentation of "Peekaboo," we compared the activity of the temporal region between the early and late trials. We set long and short delays before face-presentation. The results showed that the concentration of oxy-hemoglobin in the right occipitotemporal region (Ch 21) in both conditions increased after the presentation of "Peekaboo" relative to the baseline. Moreover, in the long delay condition, the hemodynamic modulation of the right occipitotemporal region was induced according to the repeated presentation of "Peekaboo" in infants.
