Tonic immobility: effects of dopamine receptor blockade and stimulation.
Blockade of dopaminergic receptors by haloperidol enhanced the duration of tonic immobility in chickens. Apomorphine, a dopamine receptor agonist, produced short durations. Apomorphine also produced an increase in stabilimeter activity. These data suggest dopaminergic involvement in tonic immobility, and support a competing response interpretation of the apomorphine effect.
D000818:Animals; D001058:Apomorphine / Q000494:pharmacology; D002645:Chickens; D006220:Haloperidol / Q000494:pharmacology; D006801:Humans; D007103:Immobilization / Q000187:drug effects*; D009043:Motor Activity / Q000187:drug effects; D011954:Receptors, Dopamine / Q000187:drug effects*; D013239:Stereotyped Behavior / Q000187:drug effects; D013997:Time Factors
D011954:Receptors, Dopamine; D006220:Haloperidol; D001058:Apomorphine