Figure 3

A double staining approach (Na⁺/K⁺-ATPase and MBP) to identify baroreceptor structures. Two types of can be identified: (1) solid, compacted, and ball-like structures (four arrows in upper figure denote each); (2) a much larger, extended diffuse-type structure (denoted by arrows in the upper middle of the figure). Clearly, they differ morphologically. The intensity of the staining is much higher in the former; however, both are connected to myelinated afferents (green axons), which is denoted by an arrowhead for the diffuse-type. The diffuse structure is much more easily observable in the black and white figure (bottom), in which 2 arrows denote 2 other smaller diffuse structures. The scale bar is 100 µm.