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. 1999 Jan;6(1):37–46.

Figure 1.

Figure 1

Figure 1

Figure 1

Rapid expression of a CTA. Intraoral intake of 5% sucrose was measured as weight gain during the intraoral infusion. Individual rats were tested only once at one time point (n = 4–9). Arrows indicate the times of LiCl injection (76 mg/12 ml/kg, i.p.). (A) Intraoral intake of 5% sucrose after contingent pairing of an intraoral infusion of 5% sucrose (6.6 ml over 6 min) and LiCl. Rats significantly decreased their intraoral intake of sucrose at 15 min after pairing. (*) P < 0.005 compared to noncontingent lithium or noncontingent sucrose. (B) Intraoral intake of 5% sucrose after noncontingent injection of LiCl. Rats received an intraoral infusion of 5% sucrose (6.6 ml over 6 min) 24 hr prior to the LiCl injection. Intraoral intake was not significantly reduced after noncontingent LiCl. (C) Intraoral intake of 5% sucrose after a noncontingent intraoral infusion of 5% sucrose (6.6 ml over 6 min). Rats received an injection of LiCl 24 hr prior to the intraoral infusion of sucrose. Intraoral intake was not reduced significantly after noncontingent sucrose.