Zimmerman Emily, Foran Megan
Department of Communication Sciences & Disorders, Northeastern University, Boston, MA, USA.
Acta Paediatr. 2017 May;106(5):727-732. doi: 10.1111/apa.13751. Epub 2017 Feb 23.
To determine whether patterned auditory stimuli, designed to mimic the natural burst-pause pattern evident in non-nutritive suck (NNS) with variations to the intraburst frequency, alter infants' NNS and cardiorespiratory patterning.
Sixteen healthy full-term infants participated in this study. Infants were fitted with electrocardiogram electrodes and a respiratory belt to measure cardiorespiratory patterning. Infants were offered a custom pacifier attached to a pressure transducer to measure NNS. Prior to the start of the study, a two-minute NNS and cardiorespiratory baseline was attained. Next, three auditory stimulation conditions were presented in the form of sucking clicks at interburst frequencies of 1, 2 and 4 Hz. Each of the three frequencies was played for two minutes.
Separate repeated-measures ANOVAs revealed significant differences in NNS burst duration (p = 0.013), NNS cycles/burst (p = 0.010) and NNS bursts/minute (p = 0.005) across auditory stimulation conditions. No significant differences were evident in the cardiorespiratory outcomes.
We found that patterned auditory stimulation significantly reduced NNS dynamics and had no effect on cardiorespiratory patterning. The findings further suggest that infants attempted to modulate their suck pattern to the patterned acoustic stimuli by shortening their burst durations with fewer cycles per burst.
确定模仿非营养性吸吮（NNS）中明显的自然爆发-暂停模式并改变爆发内频率的模式化听觉刺激是否会改变婴儿的NNS和心肺模式。
16名健康足月儿参与了本研究。给婴儿佩戴心电图电极和呼吸带以测量心肺模式。给婴儿提供一个连接压力传感器的定制安抚奶嘴以测量NNS。在研究开始前，获得两分钟的NNS和心肺基线数据。接下来，以1、2和4赫兹的爆发间期频率以吸吮咔哒声的形式呈现三种听觉刺激条件。三个频率中的每一个都播放两分钟。
单独的重复测量方差分析显示，在不同听觉刺激条件下，NNS爆发持续时间（p = 0.013）、NNS每爆发周期数（p = 0.010）和NNS每分钟爆发次数（p = 0.005）存在显著差异。心肺指标没有明显差异。
我们发现模式化听觉刺激显著降低了NNS动态，对心肺模式没有影响。研究结果进一步表明，婴儿试图通过缩短爆发持续时间和减少每次爆发的周期数来将其吸吮模式调整为模式化听觉刺激。
