“…However, as mentioned above, the most important region in processing facial expressions is the occipital temporal area, including the superior temporal sulcus (STS) (Andrews & Ewbank, 2004;Said et al, 2010). Our group previously applied NIRS to measure the brain activity in the bilateral occipital temporal area overlying the STS of 6-to 7-month-old infants while they viewed facial expressions and found face-related cerebral hemodynamic response (Nakato, Otsuka, Kanazawa, Yamaguchi, & Kakigi, 2011). For typically developed adults, it has been reported that the processing of facial expression occurs dominantly in the right hemisphere (Etcoff, 1984;Gainotti, 2012;Nakamura et al 1999;Tsuchiya, Kawasaki, Oya, Howard, & Adolphs, 2008).…”