The 3 J/cm² and 8 J/cm² LLLT treatments improved the sciatic functional index (SFI) in rats with a sciatic nerve crush injury.

<p>Representative images of (A) the sham-operated rat left hindlimb and (B) the sciatic-injured rat right hindlimb. (C) Functional assessment of the recovery of injured sciatic nerves by calculating the SFI in the normal rats without (normal) or with 8 J/cm² LLLT (normal+8J) and in the sciatic nerve-crushed rats without (crush) or with LLLT at 3 J/cm² (crush+3J), 8 J/cm² (crush+8J) or 15 J/cm² (crush+15J). *P<0.05, compared with crush group.