The importance of trunk motion in wearable based infant spontaneous movement analysis

Abstract The characteristics of spontaneous movements in infants are essential for the early detection of neurological pathologies, with the Prechtl method being a widely recognized approach. While the Prechtl method is effective in predicting motor risks, its reliance on the evaluator’s expertise l...

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Main Authors: María Marín-Palma, Ignacia Rojas-Sepulveda, Jessica Becerra-Caroca, José Carrasco-Plaza, Ramiro Zepeda, Pablo Ignacio Burgos
Format: Article
Language:English
Published: Nature Portfolio 2025-01-01
Series:Scientific Reports
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Online Access:https://doi.org/10.1038/s41598-025-85621-y
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author María Marín-Palma
Ignacia Rojas-Sepulveda
Jessica Becerra-Caroca
José Carrasco-Plaza
Ramiro Zepeda
Pablo Ignacio Burgos
author_facet María Marín-Palma
Ignacia Rojas-Sepulveda
Jessica Becerra-Caroca
José Carrasco-Plaza
Ramiro Zepeda
Pablo Ignacio Burgos
author_sort María Marín-Palma
collection DOAJ
description Abstract The characteristics of spontaneous movements in infants are essential for the early detection of neurological pathologies, with the Prechtl method being a widely recognized approach. While the Prechtl method is effective in predicting motor risks, its reliance on the evaluator’s expertise limits its scalability, particularly in low-income areas. In such contexts, the use of inertial sensors combined with automated analysis presents a promising accessible alternative; however, more research is necessary to get results comparable to those of the Precht method. This research aims to determine the more important metrics of trunk and limbs to assess spontaneous movement in healthy infants during the first semester of life as the basis of a sensor-based alternative. It was a cross-sectional study with 116 separate subjects divided into 3 groups: 0 M Group (N = 43), 3 M Group (N = 44), and 6 M (N = 29). Participants’ movements were recorded using 6 wireless inertial sensors (4 limbs, thorax, and pelvis). Parameters from the acceleration signal were estimated in relation to velocity, cross-correlation, kurtosis, skewness, area, and periodicity. The different stages (0 M,3 M, and 6 M) have different profiles of accelerometric parameters. Trunk and limb parameters can differentiate between 0 of 3 months (13/25 trunk and 17/36 limb parameters) and between 0 and 6 months (10/25 trunk and 20/36 limb). Mainly, trunk parameters can differentiate between 3 and 6 months (9/25 trunk vs. 3/36 limb). Additionally, only 2 trunk parameters (kurtosis and periodicity) can differentiate the 3 stages. Wearable devices can effectively detect significant differences in spontaneous movements during the first six months of life, particularly trunk-related data. The extremities could be insufficient to distinguish movements between 3 and 6 months. On the other hand, two key parameters—kurtosis of thorax velocity and periodicity of trunk velocity—successfully differentiate between the three age groups analyzed.
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spelling doaj-art-5bb162b33a1d430ea697a4f46d529e0d2025-01-12T12:16:12ZengNature PortfolioScientific Reports2045-23222025-01-0115111310.1038/s41598-025-85621-yThe importance of trunk motion in wearable based infant spontaneous movement analysisMaría Marín-Palma0Ignacia Rojas-Sepulveda1Jessica Becerra-Caroca2José Carrasco-Plaza3Ramiro Zepeda4Pablo Ignacio Burgos5Department of Physical Therapy, Faculty of Medicine, Universidad de ChileDepartment of Physical Therapy, Faculty of Medicine, Universidad de ChileNeurorehabilitation and Motor Control Lab, Department of Neuroscience, Faculty of Medicine, Universidad de ChileNeurorehabilitation and Motor Control Lab, Department of Neuroscience, Faculty of Medicine, Universidad de ChileNeurorehabilitation and Motor Control Lab, Department of Neuroscience, Faculty of Medicine, Universidad de ChileDepartment of Physical Therapy, Faculty of Medicine, Universidad de ChileAbstract The characteristics of spontaneous movements in infants are essential for the early detection of neurological pathologies, with the Prechtl method being a widely recognized approach. While the Prechtl method is effective in predicting motor risks, its reliance on the evaluator’s expertise limits its scalability, particularly in low-income areas. In such contexts, the use of inertial sensors combined with automated analysis presents a promising accessible alternative; however, more research is necessary to get results comparable to those of the Precht method. This research aims to determine the more important metrics of trunk and limbs to assess spontaneous movement in healthy infants during the first semester of life as the basis of a sensor-based alternative. It was a cross-sectional study with 116 separate subjects divided into 3 groups: 0 M Group (N = 43), 3 M Group (N = 44), and 6 M (N = 29). Participants’ movements were recorded using 6 wireless inertial sensors (4 limbs, thorax, and pelvis). Parameters from the acceleration signal were estimated in relation to velocity, cross-correlation, kurtosis, skewness, area, and periodicity. The different stages (0 M,3 M, and 6 M) have different profiles of accelerometric parameters. Trunk and limb parameters can differentiate between 0 of 3 months (13/25 trunk and 17/36 limb parameters) and between 0 and 6 months (10/25 trunk and 20/36 limb). Mainly, trunk parameters can differentiate between 3 and 6 months (9/25 trunk vs. 3/36 limb). Additionally, only 2 trunk parameters (kurtosis and periodicity) can differentiate the 3 stages. Wearable devices can effectively detect significant differences in spontaneous movements during the first six months of life, particularly trunk-related data. The extremities could be insufficient to distinguish movements between 3 and 6 months. On the other hand, two key parameters—kurtosis of thorax velocity and periodicity of trunk velocity—successfully differentiate between the three age groups analyzed.https://doi.org/10.1038/s41598-025-85621-yAccelerometryInfantsPrechtl methodGeneral movementsMotor development
spellingShingle María Marín-Palma
Ignacia Rojas-Sepulveda
Jessica Becerra-Caroca
José Carrasco-Plaza
Ramiro Zepeda
Pablo Ignacio Burgos
The importance of trunk motion in wearable based infant spontaneous movement analysis
Scientific Reports
Accelerometry
Infants
Prechtl method
General movements
Motor development
title The importance of trunk motion in wearable based infant spontaneous movement analysis
title_full The importance of trunk motion in wearable based infant spontaneous movement analysis
title_fullStr The importance of trunk motion in wearable based infant spontaneous movement analysis
title_full_unstemmed The importance of trunk motion in wearable based infant spontaneous movement analysis
title_short The importance of trunk motion in wearable based infant spontaneous movement analysis
title_sort importance of trunk motion in wearable based infant spontaneous movement analysis
topic Accelerometry
Infants
Prechtl method
General movements
Motor development
url https://doi.org/10.1038/s41598-025-85621-y
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