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Muscle formation in Ehlers-Danlos syndrome
Archives of Physical Medicine and Rehabilitation
|September 1, 1981
Summary
Connective tissue hyperdistensibility in Ehlers-Danlos Syndrome (EDS) affects muscle function, causing weakness and altered movement patterns. Training can improve proprioception and motor control in individuals with EDS.
Area of Science:
- Biomedical Engineering
- Orthopedics
- Genetics
Background:
- Ehlers-Danlos Syndrome (EDS) is a genetic connective tissue disorder.
- Key features include joint hypermobility, skin hyperextensibility, and tissue fragility.
- Understanding the impact of EDS on musculoskeletal function is crucial for patient care.
Observation:
- A young woman with classic EDS underwent comprehensive muscle function assessments.
- Testing included strength evaluations and a supervised exercise regimen.
- Electromyography and serum enzyme tests ruled out primary muscle abnormalities.
Findings:
- Generalized muscle weakness was observed, consistent with EDS.
- The quadriceps strength-length curve indicated an increased series elastic component.
- Maximal isometric strength output showed unusual fluctuations.
- A functional proprioceptive deficit was identified, responsive to training and visual input.
Implications:
- Altered connective tissue properties in EDS may directly impair muscle mechanics.
- Proprioceptive deficits and joint instability contribute to learned motor patterns characterized by jerky movements.
- These findings suggest that therapeutic strategies should address both connective tissue and neuromuscular aspects of EDS.