Intracranial intradural variations of nerve roots
Bratislavske Lekarske Listy
|March 17, 2021
Summary
Cranial nerve variations, particularly in the abducens nerve, are more common than previously thought. Understanding these anatomical differences is crucial for medical professionals.
Area of Science:
- Neuroanatomy
- Surgical Anatomy
Background:
- Intradural cranial nerve root variations in localization and number are not well-documented.
- Establishing the incidence and clinical significance of these variations is important.
Purpose of the Study:
- To investigate the frequency and types of cranial nerve root variations.
- To determine the clinical importance of observed cranial nerve variations.
Main Methods:
- Anatomical dissection of 120 sides in 60 human cadavers (51 male, 9 female).
- Data collected on the localization and number of cranial nerve roots.
Main Results:
- Abducens nerve variations occurred in 80% of cases, predominantly on the left side.
- Duplicated, double, and triple abducens nerve variations were observed.
- Atypical exit of the hypoglossal nerve was also noted.
Conclusions:
- While cranial nerve variations are generally rare, abducens nerve anomalies and atypical hypoglossal nerve exits are relatively common.
- Awareness of these variations is vital for neurosurgery, neurology, and other medical fields.
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