Michel Christine, Stets Manuela, Parise Eugenio, Reid Vincent M, Striano Tricia, Hoehl Stefanie
Institute of Psychology, Heidelberg University, Hauptstrasse 47-51, 69117 Heidelberg, Germany.
Department of Psychological and Brain Sciences, Indiana University, 1101 E. 10th St., Bloomington, IN 47405, USA.
Neuroimage. 2015 Sep;118:576-83. doi: 10.1016/j.neuroimage.2015.06.042. Epub 2015 Jun 19.
In order to elucidate the development of how infants use eye gaze as a referential cue, we investigated theta and alpha oscillations in response to object-directed and object-averted eye gaze in infants aged 2, 4, 5, and 9months. At 2months of age, no difference between conditions was found. In 4- and 9-month-olds, alpha-band activity desynchronized more in response to faces looking at objects compared to faces looking away from objects. Theta activity in 5-month-old infants differed between conditions with more theta synchronization for object-averted eye gaze. Whereas alpha desynchronization might reflect mechanisms of early social object learning, theta is proposed to imply activity in the executive attention network. The interplay between alpha and theta activity represents developmental changes in both kinds of processes during early infancy.
为了阐明婴儿如何将目光作为一种参照线索的发展过程，我们研究了2个月、4个月、5个月和9个月大婴儿在面对指向物体和避开物体的目光时的theta和alpha振荡情况。在2个月大时，未发现不同条件之间存在差异。在4个月和9个月大的婴儿中，与看向别处的面孔相比，看向物体的面孔会使alpha波段活动更多地去同步化。5个月大婴儿的theta活动在不同条件下存在差异，避开物体的目光会使theta同步性更高。虽然alpha去同步化可能反映了早期社会物体学习的机制，但theta被认为意味着执行注意力网络的活动。alpha和theta活动之间的相互作用代表了婴儿早期这两种过程的发育变化。
