Fig 7. Low-power micrographs of the medulla with dual-labeled FLI and serotonin-ir neurons from experimental (A) and control (B) rats at the level of 0.6 mm rostral to the obex.

Boxed areas in A and B, indicating the ROb, are enlarged in C and D, respectively, showing double-labeled neurons (white arrows) in the experimental rat but no double labeling in the control rat. Scale bar = 50 μm (applies to A, B), 10 μm (applies to C, D).