Partanen Eino, Kujala Teija, Tervaniemi Mari, Huotilainen Minna
Cognitive Brain Research Unit, Cognitive Science, Institute of Behavioral Sciences, University of Helsinki, Helsinki, Finland ; Finnish Center of Excellence in Interdisciplinary Music Research, Deparment of Music, University of Jyväskylä, Jyväskylä, Finland.
PLoS One. 2013 Oct 30;8(10):e78946. doi: 10.1371/journal.pone.0078946. eCollection 2013.
We investigated the neural correlates induced by prenatal exposure to melodies using brains' event-related potentials (ERPs). During the last trimester of pregnancy, the mothers in the learning group played the 'Twinkle twinkle little star'-melody 5 times per week. After birth and again at the age of 4 months, we played the infants a modified melody in which some of the notes were changed while ERPs to unchanged and changed notes were recorded. The ERPs were also recorded from a control group, who received no prenatal stimulation. Both at birth and at the age of 4 months, infants in the learning group had stronger ERPs to the unchanged notes than the control group. Furthermore, the ERP amplitudes to the changed and unchanged notes at birth were correlated with the amount of prenatal exposure. Our results show that extensive prenatal exposure to a melody induces neural representations that last for several months.
我们使用大脑的事件相关电位（ERP）研究了产前接触旋律所诱发的神经关联。在怀孕的最后三个月，学习组的母亲每周播放5次《一闪一闪小星星》的旋律。婴儿出生后以及4个月大时，我们给婴儿播放了一段经过修改的旋律，其中一些音符发生了变化，同时记录了对未改变音符和改变音符的ERP。对照组未接受产前刺激，也记录了他们的ERP。在出生时和4个月大时，学习组的婴儿对未改变音符的ERP比对照组更强。此外，出生时对改变和未改变音符的ERP振幅与产前接触的时长相关。我们的结果表明，产前大量接触一段旋律会诱发持续数月的神经表征。
