Abstract Title:

Effects of photobiomodulation with low-level laser therapy on muscle repair following a peripheral nerve injury in Wistar rats.

Abstract Source:

Photochem Photobiol. 2020 Mar 3. Epub 2020 Mar 3. PMID: 32125691

Abstract Author(s):

L Andreo, B G Ribeiro, A N Alves, Asa Martinelli, C A Soldera, Acrt Horliana, S K Bussadori, Kps Fernandes, R A Mesquita-Ferrari

Article Affiliation:

L Andreo


INTRODUCTION: Peripheral nerve injury (PNI) can lead to sensory and/or motor impairment. As a treatment photobiomodulation (PBM) has demonstrated positive effects in terms of the maintenance of muscle activation and trophism.

METHODS: Wistar rats were divided into five groups: control, injury, injury+PBM, injury+PBMn (irradiation over injured nerve), injury+PBMm (irradiation over affected muscle) and injury+PBMnm (irradiation over nerve and muscle). The left sciatic nerve was submitted to a crushing injury. Treatment was administered with low-level laser (780 nm, 0.04 cm, 1 W/cm, 3.2 J) over the injured nerve and/or the tibialis anterior muscle.

RESULTS: The effects of PBM were favorable on muscle morphology and gene expression of calcineurin, myogenin and acetylcholine receptors.

CONCLUSION: PBM led to an acceleration on muscle repair process and effects were more evident in two weeks after PNI. Thus, PBM is indicated for the area over both the injured nerve and the affected muscle.

Study Type : Animal Study

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