Fig. 3.

A and B: Effects of microinjections of saline (A) or muscimol (B) into the dorsomedial hypothalamic region consisting of the DMH and DH on skin cooling-evoked changes in physiological variables. Microinjections were made bilaterally at the time points indicated by arrowheads and broken lines. The horizontal scale bar represents 100 sec, and vertical scale bars for BAT SNA traces represent 300 μV in (A) and 50 μV in (B). C: Location of the sites of all intra-DMH/DH microinjections for the group data shown in Table 2. D: Representative view of sites of bilateral microinjections into the DMH as indicated by clusters of fluorescent beads (arrows). The scale bar represents 0.5 mm. Abbreviations: f, fornix; mt, mammillothalamic tract; and VMH, ventromedial hypothalamic nucleus.