Additional c Fos labeled sections through the nucleus tractus solitarius in control and 20% acetic acid stimulated mice (continued in the rostral direction from

Figure 5). Fos labeled sections are shown in control (A,C,E,G) versus stimulated (B,D,F,H) mouse. Sections are shown at 240 μm (A,B), 360 μm (C,D), 480 μm (E,F) and 600 μm (G,H) relative to start of the area postrema. RC  =  rostrocentral, L  =  lateral, V  =  ventral.