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31. Siwak, C.T., Tapp, P. D., & Milgram, N.W. (2001), Effect of Age and Level of Cognitive Function on Spontaneous and Exploratory Behaviors in the Beagle Dog. Learning and Memory, 8, 317-25. [Abstract]
32. Adams B., Chan A, Callahan H, Siwak C, Tapp D, Ikeda-Douglas C, Atkinson, P, Head E, Cotman CW, Milgram NW (2000), Spatial learning and memory in the dog as a model of cognitive aging. Behavioural Brain Res, 108, :47-56.
33. Adams B., Chan A, Callahan H, Milgram NW (2000), The Canine as a Model of Aging and Dementia: Recent developments. Prog. Neuro-Psychopharmacol. & Biol. Psychiatry 5 75-692.
34. Milgram NW., Siwak, CT, Gruet P, Atkinson P, Woehrlé F, Callahan H (2000), Oral administration of adrafinil improves discrimination learning in aged beagle dogs. Pharmacol, Biochem and Beha. 66, 301-305. [Abstract]
35. Head E., McCleary R., Hahn F, Milgram NW, Cotman CW (2000), Region-specific age at onset of beta-amyloid in dogs. Neurobiology of Aging, 21, 89-96. [Abstract]
36. Callahan H., Head E, Cotman CW, Milgram NW (2000), Development of a protocol for studying object recognition memory in the dog. Prog. Neuro-Psychopharmacol. & Biol. Psychiatry. 6, 54-61. [Abstract]
37. Siwak C., Callahan H, Milgram NW. (2000), Adrafinil: effects on behavior and cognition in aged canines. Prog. Neuro-Psychopharmacol. & Biol. Psychiatry , 24, 709-726. [Abstract]
38. Siwak C Gruet P, Woehrlé F, Schneider M, Muggenburg BA, Murphey HL, Callahan HM, Milgram NW (2000), Behavioral activating effects of adrafinil in aged canines. Pharmaco, Biochem and Behav , 66, 293-300. [Abstract]
39. Torp R, Head E, Milgram NW, Hahn F, Ottersen OP, Cotman CW (2000), Ultrastructural evidence of fibrillar B-amyloid associated with neuronal membranes in behaviorally characterized aged dog brains. Neurosci, 96 495-506. [Abstract]
40. Siwak CS, Gruet P, Woehrlé F,. Muggenburg B, Murphey H, Milgram NW (2000), Comparison of the effects of adrafinil, propentofylline and nicergoline on spontaneous behavior of aged dogs. American J Vet Res, 61, 1410-1414. [Abstract]