Tag: amiel tison angle

Comparison of muscle tone development in various preterm infants at birth and term corrected gestational age versus term infants – a single-center cohort study

Priyanga Seemathan, Rajeswari Muthusamy, Siva Kumar. R, Rabindran Chandran

Priyanga Seemathan, Rajeswari Muthusamy, Siva Kumar. R, Rabindran Chandran – Comparison of muscle tone development in various preterm infants at birth and term corrected gestational age versus term infants – a single-center cohort study –  Fizjoterapia Polska 2025; 25(1); 327-334

DOI: https://doi.org/10.56984/8ZG007DYDBW

Abstract
Background. Muscle tone in preterm infants (PTI) is often reduced due to maturation-related hypotonia. As intrauterine and extrauterine environments vary, the maturation of muscle tone at 40 weeks of corrected gestational age (CGA) may also differ. This study aims to compare muscle tone development in extreme PTI, very PTI, and moderate to late PTI at birth and to compare PTI of various gestational ages with full-term infants (FTI) at 40 weeks of CGA.
Methods. This observational study was conducted with 132 infants based on specific criteria after obtaining informed consent. Muscle tone in PTI of various gestational ages was measured using the Amiel-Tison angle (ATA) at birth. They were reassessed for muscle tone at 40 weeks of corrected gestational age. Muscle tone in FTI was also assessed using ATA at birth.
Results. ANOVA and post hoc analysis of the three groups showed a significant difference in muscle tone among extreme PTI, very PTI, and moderate PTI at birth for all angles (p < 0.05). ANOVA of the three PTI groups and FTI showed a significant difference between the groups (p < 0.05), except for the dorsiflexion angle between moderate PTI and FTI at 40 weeks of corrected age.
Conclusions. The significant differences in muscle tone among PTI of various gestational ages at birth and between PTI and FTI at 40 weeks of CGA emphasize the need for addressing tonal deviations appropriately based on gestational age to enhance motor development.
Key words
Amiel-Tison angle, maturation-related hypotonia, muscle tone, preterm infants
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Comparison of visual and goniometric assessment and analysis of inter observer difference in assessing amiel tison angles in high risk infants

K. P. Rupasree, Rajeswari Muthusamy, Sivakumar Ramachandran, C.Arockia Pramila, N. Udayakumar

K. P. Rupasree, Rajeswari Muthusamy, Sivakumar Ramachandran, C.Arockia Pramila, N. Udayakumar – Comparison of visual and goniometric assessment and analysis of inter observer difference in assessing amiel tison angles in high risk infants. Fizjoterapia Polska 2022; 22(1); 38-42

Abstract
Background. High risk infants (HRI) are more vulnerable for neurodevelopmental delay and require periodic developmental assessment at first year of life to prevent and identify the neuromotor deficit at an early age. Clinically visual method is widely followed in evaluating muscle tone using Amiel tison angles (ATA) in HRI but erroneous interpretation of ATA might have consequences in identification and management of subtle tonal deviation. This study intends compare the visual and Goniometric assessment and inter observer difference in the assessment of muscle tone using ATA in HRI.
Methods. 37 HRI who met the inclusion criteria were included and two Physiotherapists with similar qualifications who work in the area of paediatrics participated in the study. The first assessor assessed the ATA visually followed by Goniometric assessment which was followed by visual assessment of ATA by the second assessor.
Results. Unpaired t test was used to compare the difference between goniometric and visual assessment which showed statistically significant difference with p < 0.05. Intraclass correlation coefficient test was used to analyse the inter observer difference. Adductor and Heel to ear angles showed an excellent correlation and popliteal angle showed good correlation with ICC value of 0.97, 0.91and 0.79 respectively.
Conclusion. The result shows that interobserver difference of visual assessment is acceptable but emphasizes that the assessor should gain experience in visually assessing the angles trained initially by using goniometer to prevent erroneous interpretation which could reduce the difference between visual and goniometric estimates in the later stage.
Key words:
high risk infants, amiel tison angle, visual assessment, inter observer difference
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