Related Experiment Video
Updated: Jun 24, 2026

Quantified Assessment of Infant's Gross Motor Abilities Using a Multisensor Wearable
Published on: May 17, 2024
Association between the motor optimality score-revised and clinical variables of preterm infants
Umut Apaydın1,2, Turgay Altunalan3
1Faculty of Health Sciences, Department of Physiotherapy and Rehabilitation, Karadeniz Technical University, Trabzon, Turkey. umut.apaydin@ktu.edu.tr.
Insights
Very preterm infants show poorer motor skills and lower Motor Optimality Score-Revised (MOS-R) scores. These motor deficits are linked to clinical factors like gestational age and NICU stay, highlighting the need for early intervention in high-risk preterm infants.
Area of Science:
- Neonatal Development
- Pediatric Neurology
- Developmental Pediatrics
Background:
- Preterm birth impacts infant motor development.
- Understanding motor repertoire and Motor Optimality Score-Revised (MOS-R) in preterm infants is crucial.
- Clinical variables may influence motor outcomes in preterm infants.
Purpose of the Study:
- To evaluate motor repertoire and MOS-R scores across very, moderate, and late preterm infant groups.
- To determine the association between motor metrics and infant clinical variables.
Main Methods:
- Retrospective cohort study of 68 preterm infants.
- Utilized Prechtl's General Movement Assessment (GMA) and MOS-R.
- Collected clinical data including gestational age, birthweight, NICU stay, ventilation, and oxygen duration.
Main Results:
- Very preterm infants had significantly lower MOS-R and motor repertoire scores.
- MOS-R scores correlated with gestational age, bronchopulmonary dysplasia, NICU stay, ventilation, and oxygen duration.
- Motor repertoire scores showed similar associations, with the exception of gender.
Conclusions:
- Close monitoring of high-risk preterm infants is essential.
- Early intervention should be considered for infants with lower gestational age, prolonged hospitalization, or respiratory support.
- Motor assessments like MOS-R can identify infants needing targeted developmental support.
Background:
The goals of this study were to examine the motor repertoire and Motor Optimality Score-Revised (MOS-R) scores among the premature groups (very, moderate, and late preterm) and ascertain the connection between these metrics and the clinical variables of infants.
Methods:
This study was a retrospective cohort study. Sixty-eight preterm infants, who were followed-up in a reference university hospital, were included. Prechtl's General Movement Assessment (GMA), including the MOS-R, was used as an assessment tool. Clinical variables, such as preterm birth, birthweight, length of hospitalization, admission at neonatal intensive care unit, use of invasive mechanical ventilation, duration of oxygen therapy were collected. Infants were videoed at least single time for 2-3 min between the age of 10-16 weeks corrected age.
Results:
The median MOS-R score was 21 in the very preterm group, 23 and 24 in the moderate and late preterm groups, respectively. Early preterm infants had lower MOS-R (p:0.003) and motor repertoire scores (p:0.007) compared to moderate-late preterm groups. MOS-R scores of the infants were associated with gestational age, bronchopulmonary dysplasia, neonatal intensive care (NICU) stay, ventilation and oxygen duration (p < 0.05). The same results were obtained for the motor repertoire score, except for gender (p < 0.05).
Conclusion:
We think that it is important to closely monitor infants who have been hospitalised for a long time, who have a lower gestational age, history of bronchopulmonary dysplasia and prolonged ventilation or oxygen intake and who are in the high-risk group and to start early intervention when necessary.
