A novel two-body sensor system to study spontaneous movements in infants during caregiver physical contact
A novel two-body sensor system to study spontaneous movements in infants during caregiver physical contact
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DOI：
10.1016/j.infbeh.2019.101383
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发表时间：
2019-11-01
影响因子：
2.1
通讯作者：
Lee, Mei-Hua
中科院分区：
文献类型：
--
作者：
Patel, Priya;Shi, Yan;Lee, Mei-Hua
自发运动是指在没有任何外部刺激的情况下重复的肢体运动，被发现可以反映婴儿期的神经发育状态。这些动作受到个人和环境因素的调节，包括与护理人员的身体接触（握持）。然而，测量身体接触期间的自发运动是一个挑战，因为在这种情况下，婴儿产生的运动会与护理人员产生的运动结合在一起。在这里，我们建议使用一种新颖的二体传感器系统来区分婴儿在与护理人员发生身体接触的情况下产生的运动。在不同的模拟家庭活动中记录了七个正常发育的婴儿及其照顾者的数据，其中涉及身体互动、照顾者的运动和婴儿位置的不同组合。该二体传感器系统由两个可穿戴加速度计组成，一个放置在婴儿的手臂上，另一个放置在护理人员的手臂上，我们开发了一种基于卡尔曼滤波器的算法来隔离婴儿产生的运动。此外，还录制视频进行定性分析。结果表明，当与护理人员没有身体接触时，自发运动活动更高。当有身体接触时，当护理人员保持静止且水平抱婴儿时，自发运动会增加。这些结果表明，新型二体传感器系统和相关算法能够隔离婴儿在与护理人员身体接触期间产生的运动。这种方法有望对婴儿的自发运动进行自动长期跟踪，这可能为发育障碍提供重要的见解。
Spontaneous movements, which refer to repetitive limb movements in the absence of any external stimulus, have been found to be reflective of neurodevelopmental status during infancy. These movements are modulated by both individual and environmental factors, including physical contact (holding) with the caregiver. However, it is a challenge to measure spontaneous movements during physical contact because infant-generated movements become coupled with caregiver-generated movements in such contexts. Here, we propose the use of a novel two-body sensor system to distinguish infant-generated movements in the presence of physical contact with the caregiver. Data from seven typically developing infants and their caregivers were recorded during different simulated home activities, which involved different combinations of physical interaction, caregiver's movement and infant positions. The two-body sensor system consisted of two wearable accelerometers one placed on the infant's arm and one on the caregiver's arm, and we developed a Kalman-filter based algorithm to isolate the infant-generated movements. In addition, video was recorded for qualitative analysis. Results indicated that spontaneous movement activity was higher when there was no physical contact with caregiver. When there was physical contact, spontaneous movements were increased when the caregiver was still and when the infant was held horizontally. These results show that the novel two-body sensor system and the associated algorithms were able to isolate infant-generated movements during physical contact with the caregiver. This approach holds promise for the automated long-term tracking of spontaneous movements in infants, which may provide critical insight into developmental disorders.