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Results of FG corticospinal tract retrograde tracing. A: Few FG-labeled pyramidal cells and axons in the cephalic of spinal cord injury area in spinal cord injury group, hyperbaric oxygen group and sham group (× 200); B: A few FG-labeled pyramidal cells and axons in the cephalic of spinal cord injury area in hyperbaric oxygen group (× 200); C: Many FG-labeled pyramidal cells and axons in the cephalic of spinal cord injury area in sham group, with gold fluorescence (× 200).
