title: Changes in drug-induced stereotyped behavior after 6-OHDA lesions in noradrenaline neurons.
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 X 3-8 mug/4 mul 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.
mesh_terms: D000818:Animals; D001058:Apomorphine / Q000494:pharmacology; D001519:Behavior / Q000502:physiology*; D001921:Brain / Q000187:drug effects / Q000378:metabolism; D003913:Dextroamphetamine / Q000494:pharmacology; D004298:Dopamine / Q000378:metabolism / Q000502:physiology; D006801:Humans; D006892:Hydroxydopamines / Q000494:pharmacology*; D008297:Male; D009474:Neurons / Q000187:drug effects / Q000502:physiology*; D009638:Norepinephrine / Q000378:metabolism / Q000502:physiology*; D010627:Phenethylamines / Q000494:pharmacology; D011530:Protriptyline / Q000494:pharmacology; D051381:Rats; D012701:Serotonin / Q000378:metabolism; D013239:Stereotyped Behavior / Q000187:drug effects / Q000502:physiology*
chemical_list: D006892:Hydroxydopamines; D010627:Phenethylamines; D012701:Serotonin; D011530:Protriptyline; D001058:Apomorphine; D003913:Dextroamphetamine; D004298:Dopamine; D009638:Norepinephrine