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Updated: Jul 23, 2026
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Event-related Potentials During Target-response Tasks to Study Cognitive Processes of Upper Limb Use in Children with Unilateral Cerebral Palsy
Published on: January 11, 2016
Erb's palsy: concepts of causation
1OB GYN Associates of Green Bay, Green Bay, Wisconsin, USA.
Obstetrics and Gynecology
|June 1, 2000
Summary
Erb
Area of Science:
- Obstetrics and Gynecology
- Neonatal Neurology
- Pediatric Orthopedics
Background:
- Traditional obstetric texts attribute Erb's palsy to birth attendant actions like excessive head traction.
- This long-held belief lacks empirical evidence and requires re-evaluation.
Purpose of the Study:
- To investigate the causative mechanisms of Erb's palsy beyond the direct control of birth attendants.
- To challenge the conventional understanding of Erb's palsy etiology.
Main Methods:
- Analysis of case data correlating Erb's palsy with shoulder dystocia.
- Comparison of injury rates across different obstetric maneuvers for shoulder dystocia management.
- Statistical association between precipitate labor and Erb's palsy incidence.
Main Results:
- Only 50% of Erb's palsy cases were linked to shoulder dystocia.
- A precipitate second stage of labor showed a 4.7-fold increased risk.
- Injury rates were similar between direct manipulation and less invasive techniques for shoulder dystocia.
Conclusions:
- The findings refute the theory that birth attendants directly cause Erb's palsy through traction.
- Nerve stretching due to the propulsive forces of labor appears to be the primary mechanism.
- Obstetricians have limited control over the nerve stretching implicated in Erb's palsy.
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