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Peripheral nerve injury and regeneration.

Authors: Terenghi, G.;

Peripheral nerve injury and regeneration.

Abstract

The process of nerve regeneration has been studied extensively by traditional morphological methods, but it is only recently that has been possible to identify more precisely the contribution of different nerve subpopulations. By studying different models of nerve repair and regeneration, it is becoming apparent that other tissue components are contributing to the overall process. When muscle grafting is carried out to repair an injured nerve, the regenerating axons are migrating in parallel with Schwann cells to bridge the nerve gap. The presence of Schwann cells is essential for a successful nerve regeneration, most probably because their production of different neuronal trophic factors. This pattern is also repeated when fibronectin mats are used for nerve repair, indicating the possibility to use this new synthetic matrix for clinical application. If the target organ is analysed after nerve repair, the recovery of all nerve components is evident. However, the process occurs at different times in separate skin compartments, and the regeneration of the autonomic innervation appears to be preceded by that of the sensory nerves. When looking at cutaneous nerve regeneration following different type of injury, a common pattern of events becomes apparent. In skin flaps, nerve regeneration begins from the skin surrounding the wound edge, or from the pedicle, and sensory nerves are the first to penetrate into the flap. Angiogenesis precedes reinnervation of the flap, and initially regenerating fibres appear to be associated with newly formed blood vessels. This pattern is evident also in full-thickness wounds and in suction blisters, where only the more superficial cutaneous layer is disrupted. Furthermore, the presence of keratinocytes appears to exert a directional influence on both regenerating blood vessels and nerves, which follow the regenerating keratinocytes when reepidermalisation is taking place. These results would indicate that there is a close relationship between nerve fibres and blood vessels during regeneration, with a substantial contribution to the process from other tissue components and soluble factors from the surrounding environment.

Country
Spain
Keywords

Nerve Regeneration, Nerve regeneration, :6 - Ciencias aplicadas::61 - Medicina [CDU], Peripheral Nerve Injuries, Peripheral Nervous System, CDU::6 - Ciencias aplicadas::61 - Medicina, Animals, Humans, Angiogenesis, Peripheral Nerves

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    51
    popularity
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    Average
    influence
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    Top 10%
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
51
Average
Top 10%
Average
Green