Related Experiment Video
Updated: Mar 24, 2026
Methods for In Vivo Biomechanical Testing on Brachial Plexus in Neonatal Piglets
Published on: December 19, 2019
Impaired Automatic Arm Movements in Obstetric Brachial Plexus Palsy Suggest a Central Disorder
Galia V Anguelova1, Martijn J A Malessy2, Sonja M Buitenhuis3
1Department of Neurosurgery, Leiden University Medical Centre, Leiden, Netherlands Department of Neurology, Leiden University Medical Centre, Leiden, Netherlands g.v.anguelova@lumc.nl.
Insights
Children with obstetric brachial plexus palsy show impaired automatic arm movements, suggesting a central nervous system component to their motor deficits. This impacts balance control and arm function during daily activities.
Area of Science:
- Pediatric Neurology
- Movement Disorders
- Neurorehabilitation
Background:
- Obstetric brachial plexus palsy (OBPP) is a common birth injury affecting arm function.
- The underlying pathophysiology, particularly the contribution of central versus peripheral deficits, requires further elucidation.
Purpose of the Study:
- To investigate the presence of a central motor control impairment in the affected arm of children with OBPP.
- To differentiate central from peripheral contributions to arm movement deficits in OBPP.
Main Methods:
- Cross-sectional study involving 19 children with OBPP (median age 5 years).
- Participants performed balance tasks requiring automatic arm abduction.
- Video analysis by 3 investigators assessed arm movement deficits compared to voluntary movements.
Main Results:
- Children with OBPP demonstrated significantly less automatic arm abduction compared to their unaffected arm (P = .001).
- This deficit in automatic movement was not present during voluntary arm abduction.
- Findings suggest a central, rather than purely peripheral, origin for the observed motor impairment.
Conclusions:
- A central component contributes to the impaired arm movement in children with obstetric brachial plexus palsy.
- Automatic motor programming deficits are evident in OBPP, impacting balance reactions.
- This highlights the need for neurorehabilitation strategies addressing central motor control in OBPP management.
Abstract:
The authors aimed to find evidence for a central component of the impairment of movement of the affected arm in children with obstetric brachial plexus palsy. The authors performed a cross-sectional study in 19 children (median age 5 years) with obstetric brachial plexus palsy who were able to voluntarily abduct their affected arm beyond 90 degrees. They were asked to perform 4 tasks designed to provoke automatic arm movements to maintain balance. The authors assumed automatic motor programming to be impaired when 2 of 3 investigators agreed using video recordings that the affected arm did not abduct beyond 90 degrees while the unaffected arm did. Children abducted the affected arm less often than the healthy one (generalized binary logistic model of all 4 tasks, P = .001). The deficit during automatic arm abduction was not observed during voluntary movements and therefore cannot be explained by a peripheral deficit, suggesting a central component.
More Related Videos
Related Concept Videos
01:22Spinal Nerves: Plexus I
The Cervical Plexus
The cervical plexus, formed by the anterior rami of the first four...
01:12Arteries of the Upper Limbs
01:21Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation