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Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
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Optic Nerve Transection: A Model of Adult Neuron Apoptosis in the Central Nervous System
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Supernumerary Abducens Nerves: A Comprehensive Review.

Joy M H Wang1, Bryan Adam Edwards1, Marios Loukas1

  • 1Department of Anatomical Sciences, St. George's University, Grenada, West Indies.

World Neurosurgery
|November 22, 2017
PubMed
Summary

Duplicated or triplicated abducens nerves are rare variations where multiple nerve roots originate from the brainstem. Awareness of these supernumerary abducens nerve variants is crucial for neurosurgeons.

Keywords:
AbducensAnatomyBranchingCranial nervesCraniumDuplicationNeurosurgerySkull baseVariation

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Area of Science:

  • Neuroanatomy
  • Cranial Nerve Variations

Background:

  • Abducens nerve branching and replication are documented variations.
  • Rare forms include duplicated or triplicated nerves with multiple brainstem origins.

Purpose of the Study:

  • To review literature on supernumerary abducens nerve variations.
  • To discuss hypotheses, clinical relevance, and future research directions.

Main Methods:

  • Systematic literature search using PubMed and Google Scholar.
  • Screening of identified studies for inclusion.

Main Results:

  • 16 studies were included in the review.
  • Included studies comprised 11 cadaveric studies and 6 case reports.

Conclusions:

  • Highlights the importance of recognizing abducens nerve variants.
  • Emphasizes the need for neurosurgical awareness during imaging and surgery.