Figure 3: Effect of OFS on the histological morphology of injured spinal cords in SCI rats (hematoxylin and eosin staining). No significant differences were observed between the two groups under hematoxylin-eosin staining. (A, B) At Week 2, the border between white and gray matter was unclear. (C, D) Tissue defect on Week 6. (E, F) Glial scar on Week 12. Scale bars: 400 μm. OFS: Oscillating field stimulation; SCI: spinal cord injury.