Fig. 3

Retrograde axonal tracing with FG in sensory neurons or motor neurons. a Representative image of FG-labeled sensory neurons in DRGs or motor neurons in the anterior horn of gray matter of spinal cord in the autograft, TENG, conduit, and uninjured groups at the 12th week after grafting; the golden-colored fluorescence was concentrated in the cell body of neurons. Scale bar, 150 μm. b Histograms showing the percentage of FG-labeled sensory neurons and the total number of FG-labeled motor neurons in 4 groups. n = 4; ***p < 0.001 compared with the uninjured group, ^###p < 0.001 compared with the autograft group, ^△△p < 0.01 compared with the conduit group