Abstract：
Preterm infants are challenged to adapt to an extrauterine milieu, while their interoceptive system and autonomic regulation capacity is still immature. Caressing parental touch is known to foster parasympathetic regulation in infants by stimulating C-tactile (CT) afferents and in preterm infants, slow stroking stimulation also leads to a heart rate decrease. The particular impact of maternal stroking has not yet been investigated and factors influencing the maturation of the CT system in preterm infants remain unclear. We therefore analysed 53 standardized events in which preterm infants (24 to 36 weeks gestational age at birth) were stroked by their mothers. Video analysis revealed that mothers use CT optimal velocities to stroke their preterm child. Analysis of pulse oximetric data showed no effect of stroking on infantile blood oxygenation, but a significant decrease of the heart rate. Compared to term-born children, this decrease was delayed by about two minutes. Furthermore, our data suggested that more immature preterm infants benefited less from stroking than more mature ones. We conclude that maternal stroking touch targets CT afferents in preterm infants and that the preterm CT system is not yet mature.
摘要：
早产儿面临适应子宫外环境的挑战，而他们的交互感受系统和自主调节能力还不成熟。众所周知，通过刺激C触觉（CT）传入和早产儿，爱抚父母的触摸可以促进婴儿的副交感神经调节，缓慢的刺激也会导致心率下降。尚未研究母亲抚摸的特殊影响，影响早产儿CT系统成熟的因素尚不清楚。因此，我们分析了53个标准化事件，其中早产儿（出生时24至36周胎龄）被母亲抚摸。视频分析显示，母亲使用CT最佳速度来中风早产儿。对脉搏血氧数据的分析表明，抚摸对婴儿血液氧合没有影响，但心率显著下降。与足月出生的孩子相比，这种减少延迟了大约两分钟。此外，我们的数据表明,与更成熟的早产儿相比,更多的未成熟早产儿从抚摸中获益较少.我们得出的结论是，母体抚摸触摸针对早产儿的CT传入，并且早产儿CT系统尚未成熟。
