Loading...
Please wait, while we are loading the content...
Similar Documents
Role of the amygdala in the reinforcement omission effect
| Content Provider | Semantic Scholar |
|---|---|
| Author | Bueno, José Lino De Oliveira Judice-Daher, Danielle Marcilio Tavares, Tatiane Ferreira |
| Copyright Year | 2013 |
| Abstract | The reinforcement omission effect (ROE) has been attributed to both motivational and attentional consequences of surprising reinforcement omission. Recent evidence suggests that the basolateral complex of the amygdala is involved in motivational components related to reinforcement value, whereas the central nucleus of the amygdala is involved in the processing of the attentional consequences of surprise. This study was designed to verify whether the mechanisms involved in the ROE depend on the integrity of either the basolateral amygdala complex or central nucleus of the amygdala. The ROE was evaluated in rats with lesions of either the central nucleus or basolateral complex of the amygdala and trained on a fixed-interval schedule procedure (Experiment 1) and fixed-interval with limited hold signaled schedule procedure (Experiment 2). The results of Experiment 1 showed that sham-operated rats and rats with lesions of either the central nucleus or basolateral area displayed the ROE. In contrast, in Experiment 2, subjects with lesions of the central nucleus or basolateral complex of the amygdala exhibited a smaller ROE compared with sham-operated subjects. Thus, the effects of selective lesions of amygdala subregions on the ROE in rats depended on the training procedure. Furthermore, the absence of differences between the lesioned groups in either experiment did not allow the dissociation of attentional or motivational components of the ROE with functions of specific areas of the amygdala. Thus, results did not show a functional double-dissociation between the central nucleus and basolateral area in the ROE. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.redalyc.org/pdf/2070/207025281008.pdf |
| Alternate Webpage(s) | http://www.scielo.br/pdf/pn/v5n2/18.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Amygdaloid structure Cell Nucleus Cerebellar Nuclei Experiment Kohn–Sham equations Small central amygdalar nucleus |
| Content Type | Text |
| Resource Type | Article |
