Intraspinal extradural variations of nerve roots
Viktor Matejčík1, Zora Haviarová2, Andrej Šteňo1
1Faculty of Medicine, University Hospital, Comenius University, Department of Neurosurgery, Bratislava, Slovak Republic.
Summary
Intraspinal extradural anatomical variations in nerve roots were identified, with over 27% showing plexus formation differences. These variations, particularly in the lumbosacral region, may contribute to radiculopathy.
Area of Science:
- Anatomy
- Neurology
- Radiology
Background:
- Nerve root variations can influence neurological conditions.
- Understanding intraspinal extradural anatomy is crucial for diagnosing radiculopathy.
Purpose of the Study:
- To identify and describe intraspinal extradural anatomical variations of nerve roots.
- To explore the potential role of these variations in radiculopathy.
Main Methods:
- Anatomical study of 33 cadavers.
- Histological examination of extradural nerve root anastomoses.
- Classification of plexus formation types.
Main Results:
- Plexus formation variations observed in 27.3% of cases (prefixed and post-fixed types).
- Extradural anatomical variations occurred in 60.6% of cases, more frequent on the left and bilaterally.
- Atypical spacing noted in 24.2% of instances, especially in the lumbosacral region.
Conclusions:
- Identified novel intraspinal extradural nerve root variations and their spinal canal interrelationships.
- Higher incidence of intraspinal extradural variations observed, particularly between sacral roots.
- Incidence of variations is dependent on plexus formation type.
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