Abstract
Drug-induced stereotyped behaviors are often assessed by rating scales where the eventual appearance of sniffing, licking, and biting are rated as increasing intensity of dopaminergic stimulation. A 6-OHDA induced bilateral lesion (4×3-8 μg/4 μl 6-OHDA) in the ascending noradrenaline neurons, lateral to the medial raphe nucleus, of 180 g Wistar rats, affecting selectively noradrenaline and not dopamine or 5-hydroxytryptamine neurons, caused a change in the d-amphetamine sulphate (5–3 mg/kg s.c.) and phenethylamine hydrochloride (40 mg/kg) induced stereotyped sniffing behavior to the performance of discontinuous or continuous licking behavior; biting/gnawing was rarely induced. The site of the lesion and the partial antagonism of 6-OHDA by the uptake inhibitor protriptyline indicate a noradrenergic influence on the behavioral expression of the dopaminergically mediated stereotyped behavior.
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Bræstrup, C. Changes in drug-induced stereotyped behavior after 6-OHDA lesions in noradrenaline neurons. Psychopharmacology 51, 199–204 (1977). https://doi.org/10.1007/BF00431741
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DOI: https://doi.org/10.1007/BF00431741