Figure 4
From: Infant brain activity in response to yawning using functional near-infrared spectroscopy
The timeline of the stimulus presentation. In each trial, images of five kinds of vegetables were presented during the baseline period for at least 13.2 s. In the test period, yawning or mouth movements were presented for 13.2 s. The presentation order of yawning and mouth movement in test period was counterbalanced across infants.
