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Updated: Feb 20, 2026

Methods for In Vivo Biomechanical Testing on Brachial Plexus in Neonatal Piglets
Published on: December 19, 2019
Relationship of age and type of obstetric brachial plexus paralysis in forearm pronosupination
Yussef Ali Abdouni1, Gabriel Faria Checoli1, Valdênia das Graças Nascimento2
1Faculdade de Ciências Médicas da Santa Casa de São Paulo, Departamento de Ortopedia e Traumatologia, São Paulo, SP, Brazil.
Insights
Forearm pronosupination is limited in children with birth paralysis sequelae. Age and injury type do not influence this limitation, highlighting the consistent impact of brachial plexus injuries.
Area of Science:
- Pediatric Orthopedics
- Neuromuscular Disorders
- Rehabilitation Medicine
Background:
- Birth paralysis, resulting from brachial plexus injuries, frequently leads to long-term functional deficits in children.
- Limited forearm pronosupination significantly impacts daily activities and quality of life for affected individuals.
Purpose of the Study:
- To quantify the arc of forearm pronosupination in children with sequelae of birth paralysis.
- To investigate the correlation between pronosupination limitations and patient variables such as age and injury type.
Main Methods:
- Evaluated 32 children (aged 4-14 years) with total or partial brachial plexus lesions.
- Measured active and passive pronation and supination arcs on both injured and unaffected sides.
Main Results:
- A statistically significant reduction in pronosupination was observed on the injured side compared to the unaffected side.
- No significant differences in pronosupination limitations were found based on the age of the child or the specific type of brachial plexus injury.
Conclusions:
- The degree of forearm pronosupination limitation in children with birth paralysis sequelae is not influenced by age or the type of brachial plexus injury.
- These findings underscore the consistent functional impairment caused by birth paralysis, irrespective of specific demographic or etiological factors.
Objective:
To evaluate the arc of forearm pronosupination of patients with sequelae of birth paralysis and correlate with these variables.
Methods:
32 children aged between 4 and 14 years with total or partial lesions of the brachial plexus were evaluated; measurements of pronation and supination, active and passive, were made, both on the injured side and the unaffected side.
Results:
A statistically significant difference was observed between the injured side and the normal side, but there was no difference between the groups regarding age or type of injury.
Conclusion:
The age and type of injury did not impact on the limitation of the forearm pronosupination in children with sequelae of birth paralysis.
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