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Clinical Trial
. 2022 Feb 24;12(1):3138.
doi: 10.1038/s41598-022-07139-x.

Deep learning-based quantitative analyses of spontaneous movements and their association with early neurological development in preterm infants

Affiliations
Clinical Trial

Deep learning-based quantitative analyses of spontaneous movements and their association with early neurological development in preterm infants

Hyun Iee Shin et al. Sci Rep. .

Abstract

This study aimed to develop quantitative assessments of spontaneous movements in high-risk preterm infants based on a deep learning algorithm. Video images of spontaneous movements were recorded in very preterm infants at the term-equivalent age. The Hammersmith Infant Neurological Examination (HINE) was performed in infants at 4 months of corrected age. Joint positional data were extracted using a pretrained pose-estimation model. Complexity and similarity indices of joint angle and angular velocity in terms of sample entropy and Pearson correlation coefficient were compared between the infants with HINE < 60 and ≥ 60. Video images of spontaneous movements were recorded in 65 preterm infants at term-equivalent age. Complexity indices of joint angles and angular velocities differed between the infants with HINE < 60 and ≥ 60 and correlated positively with HINE scores in most of the joints at the upper and lower extremities (p < 0.05). Similarity indices between each joint angle or joint angular velocity did not differ between the two groups in most of the joints at the upper and lower extremities. Quantitative assessments of spontaneous movements in preterm infants are feasible using a deep learning algorithm and sample entropy. The results indicated that complexity indices of joint movements at both the upper and lower extremities can be potential candidates for detecting developmental outcomes in preterm infants.

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Conflict of interest statement

The authors declare no competing interests.

Figures

Figure 1
Figure 1
Overall processes of acquisition of joint angles and joint angular velocities at the upper and lower extremities from video images of spontaneous movements in preterm infants. S shoulder, E elbow, W wrist, H hip, K knee, A ankle.
Figure 2
Figure 2
Illustrations of joint angles and joint angular velocities at the bilateral shoulders, elbows, hips, and knees in two preterm infants with Hammersmith Infant Neurological Examination (HINE) ≥ 60 (A,B) and those with HINE < 60 (C,D).

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