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Related Concept Videos

Neurogenesis and Regeneration of Nervous Tissue01:15

Neurogenesis and Regeneration of Nervous Tissue

In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...

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Regenerative Peripheral Nerve Interface: Surgical Protocol for a Randomized Controlled Trial in Postamputation Pain
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Reverse end-to-side neurotization in a regenerating nerve.

Jonathan E Isaacs1, Seth Cheatham, Elliott B Gagnon

  • 1Department of Orthopaedic Surgery, Virginia Commonwealth University Medical Center, Richmond, Virginia 23298, USA. jisaacs@mcvh-vcu.edu

Journal of Reconstructive Microsurgery
|September 23, 2008
PubMed
Summary

This study demonstrates that a reverse end-to-side nerve repair allows axons to successfully invade an intact nerve, achieving functional recovery. This technique shows promise for nerve regeneration following injury.

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Area of Science:

  • Neuroscience
  • Regenerative Medicine
  • Surgical Innovation

Background:

  • Neuroma-in-continuity injuries require complex surgical repair techniques.
  • Bypass grafting with end-to-side repairs is used, but the distal repair mechanism is poorly understood.
  • Axonal regeneration into the side of an intact nerve presents a unique challenge.

Purpose of the Study:

  • To investigate the efficacy of reverse end-to-side nerve repair in promoting axonal regeneration.
  • To determine if axons can successfully enter the side of an intact nerve and achieve functional reinnervation.
  • To compare functional recovery after reverse end-to-side repair versus traditional end-to-end repair.

Main Methods:

  • A reverse end-to-side repair was performed by suturing the peroneal nerve to the tibial nerve in 20 rats.
  • A control group of 10 rats underwent primary end-to-end tibial nerve repair.
  • Muscle contraction forces were measured, and axonal pathways were selectively eliminated to assess reinnervation.

Main Results:

  • Both reverse end-to-side and end-to-end repairs resulted in significant axonal reinnervation.
  • Functional recovery was observed in muscles innervated by both peroneal and tibial nerve axons.
  • The study confirmed successful axonal invasion into the side of the intact nerve graft.

Conclusions:

  • Reverse end-to-side nerve repair is a viable technique for achieving functional recovery after nerve injury.
  • Axonal regeneration can effectively occur across a reverse end-to-side interface.
  • This surgical approach offers a promising alternative for managing neuromas-in-continuity.