| Texto completo | |
| Autor(es): |
Ferreira‚ R.
;
Bassi‚ GS
;
Cabral‚ A.
;
Nobre‚ MJ
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | NEUROSCIENCE RESEARCH; v. 68, n. 4, p. 290-300, 2010. |
| Resumo | |
Ritalin (methylphenidate hydrochloride, MP) is a non-amphetamine psychostimulant and is the drug of choice to treat children and adults diagnosed with the attention deficit hyperactivity disorder (ADHD). Several studies have demonstrated that rats treated with MP during early developmental stage exhibit alterations in anxiety-related processes such as an increased response to stressful stimuli and elevated plasma levels of corticosterone. Accordingly, the present study was designed to further characterize the neural and behavioral consequences of withdrawal from MP in adult rats and its influence on the neural reactivity of the dorsal midbrain. After initial exposure to an elevated plus-maze (EPM), brainstem neural activation, elicited by exposure to EPM aversive cues, was analyzed using a Fos-protein immunolabeling technique. Additional independent groups of animals were submitted to electrical stimulation of the dorsal column (DPAG) or the startle response procedure, in order to verify the influence of withdrawal from MP on the expression of unconditioned fear induced by DPAG activation and the effects of or withdrawal from MP on motor response, respectively. Our results provide new findings about the influence of MP treatment in adult rats, showing that, after a sudden MP treatment-break, increased anxiety, associated with the neural sensitization of anxiety-related regions, ensues. (C) 2010 Elsevier Ireland Ltd and the Japan Neuroscience Society. All rights reserved. (AU) | |
| Processo FAPESP: | 04/02859-0 - Neurobiologia do abuso de drogas |
| Beneficiário: | Manoel Jorge Nobre Do Espirito Santo |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |
| Processo FAPESP: | 08/05724-9 - NEUROBIOLOGIA DO ABUSO DE DROGAS: Estudo comportamental e farmacológico sobre o medo e ansiedade eliciados em ratos abstinentes de álcool e morfina, e da importância de estruturas mesencefálicas na modulação dessas respostas. |
| Beneficiário: | Manoel Jorge Nobre Do Espirito Santo |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |