The effects of apomorphine in pigeons : some supplementary notes

Abstract

These supplementary notes pertain to the Delius, Acerbo, Krug, Lee, and Leydel (2015) paper and summarize some earlier findings about the influence of the environment on the apomorphine (apo) effect, describe the variability of apo effects, the effects of apo infusion, the individual occurrence of apo insensitivity, its indifference with regard to reward conditioning, the hysteresis due to treatment shifts, an extension to the state discrimination account, the effect of a pecking response restraint, a supplement to the conditioning model, some additional remarks regarding the generality of this model and a possible addition to it, a characterization of the response stereotypy, the difficulties with peck type conversions, the relation displacement activities, the occurrence of individual response idiosyncracies, the “mystery” of apo specificity, and a summary of the pharmacological support for the neural model.