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Magnetoencephalographic signatures of conscious processing before birth
Developmental Cognitive Neuroscience ( IF 4.7 ) Pub Date : 2021-05-17 , DOI: 10.1016/j.dcn.2021.100964
Julia Moser 1 , Franziska Schleger 2 , Magdalene Weiss 3 , Katrin Sippel 4 , Lorenzo Semeia 1 , Hubert Preissl 5
Affiliation  

The concept of fetal consciousness is a widely discussed topic. In this study, we applied a hierarchical rule learning paradigm to investigate the possibility of fetal conscious processing during the last trimester of pregnancy. We used fetal magnetoencephalography, to assess fetal brain activity in 56 healthy fetuses between gestational week 25 and 40, during an auditory oddball paradigm containing first- and second-order regularities. The comparison of fetal brain responses towards standard and deviant tones revealed that the investigated fetuses show signs of hierarchical rule learning, and thus the formation of a memory trace for the second-order regularity. This ability develops over the course of the last trimester of gestation, in accordance with processes in physiological brain development and was only reliably present in fetuses older than week 35 of gestation. Analysis of fetal autonomic nervous system activity replicates findings in newborns, showing importance of activity state for cognitive processes. On the whole, our results support the assumption that fetuses in the last weeks of gestation are capable of consciously processing stimuli that reach them from outside the womb.



中文翻译:

出生前有意识处理的脑磁图特征

胎儿意识的概念是一个广泛讨论的话题。在这项研究中,我们应用分层规则学习范式来调查妊娠最后三个月胎儿意识处理的可能性。我们使用胎儿脑磁图来评估 56 名健康胎儿在妊娠 25 周和 40 周之间,在包含一阶和二阶规律的听觉古怪范式期间的胎儿大脑活动。胎儿大脑对标准和异常音调的反应的比较表明,被调查的胎儿显示出分层规则学习的迹象,从而形成了二阶规律的记忆痕迹。这种能力在妊娠的最后三个月发展,与大脑生理发育过程一致,并且仅在妊娠 35 周以上的胎儿中可靠存在。胎儿自主神经系统活动的分析复制了新生儿的发现,显示了活动状态对认知过程的重要性。总的来说,我们的结果支持这样一个假设,即妊娠最后几周的胎儿能够有意识地处理从子宫外到达它们的刺激。

更新日期:2021-05-22
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