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. 2018 Jul 2;5:127. doi: 10.3389/fvets.2018.00127

Figure 2.

Figure 2

(i) Odorant sequence: Green down arrow indicates the starting of the stimulant presentation and red up arrow indicates ending of the stimulation. (ii) Vacuuming sequence: Green down arrow indicates the starting of the vacuuming to remove odorant and the red up arrow indicates ending of vaccuuming. (iii) Block Design: “0” indicates the absence of an odorant (OFF condition) and “1” indicates the presence of an odorant (ON condition).