, Volume 51, Issue 2, pp 199–204 | Cite as

Changes in drug-induced stereotyped behavior after 6-OHDA lesions in noradrenaline neurons

  • C. Bræstrup
Animal Studies


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.

Key words

Stereotyped behavior 6-Hydroxydopamine Noradrenaline ascending neurons Amphetamine Phenethylamine Dopamine 


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Copyright information

© Springer-Verlag 1977

Authors and Affiliations

  • C. Bræstrup
    • 1
  1. 1.Psychopharmacological Research LaboratorySct. Hans Hospital, Dept. ERoskildeDenmark

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