Abstract

BUENO, JOSÉ LINO OLIVEIRA; JUDICE-DAHER, DANIELLE MARCILIO  and  TAVARES, TATIANE FERREIRA. Neurobiology of expectancy effects and omission of reinforcement on behavior. Av. Psicol. Latinoam. [online]. 2013, vol.31, n.1, pp.181-191. ISSN 1794-4724.

The reinforcement omission effects have been traditionally interpreted in terms of: behavioral facilitation after reinforcement omission induced by primary frustration or behavioral suppression after reinforcement delivery induced by postconsummatory states. The studies reviewed here indicate that amygdala is involved in modulation of these effects. However, the fact that amygdala lesions, extensive or selective, can eliminate, reduce and enhance the omission effects makes it difficult to understand how it is the exact nature of their involvement. The amygdala is related to several functions that depend on its connections with other brain systems. Thus, it is necessary to consider the involvement of a more complex neural network in the modulation of the reinforcement omission effects. The connection of amygdala subareas to cortical and subcortical structures may be involved in this modulation since they also are linked to processes related to reward and expectancy.

Keywords : reinforcement omission; basolateral complex of amygdala; central nucleus of amygdala; expectancy; reinforcement signalization.

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