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. Author manuscript; available in PMC: 2010 Jun 1.
Published in final edited form as: Neurobiol Aging. 2008 Oct 23;31(6):1032–1043. doi: 10.1016/j.neurobiolaging.2008.09.002

Fig. 2.

Fig. 2

Trials to a learning criterion of 8 CRs in 9 consecutive trials (in a session with a minimum of 40% CRs) in 120 rabbits tested in the 600 or 750 ms trace eyeblink classical conditioning paradigm treated with 3.0 mg/kg galantamine, 1.0 mg/kg MEM-3389, or vehicle. Rabbits in the 27-month age group took significantly more trials to attain learning criterion than 4-month rabbits, and galantamine and MEM-3389 significantly reduced trials to criterion over vehicle in 4-month but not in 27-month rabbits.