ISSN:
1432-2072
Keywords:
Animal model
;
Rat
;
Tardive dyskinesia
;
Oral dyskinesia
;
Chronic haloperidol
;
Neuroleptic
;
6-Hydroxydopamine
;
Kainic acid
;
Frontal cortex
;
Striatum
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract After 10–12 weeks of chronic haloperidol administration rats with frontal cortex ablations or lesions induced by intracerebroventricular injection of 6-hydroxydopamine developed vacuous chewing behavior at a fairly stable frequency (bifrontal ablations had 15–20, 6-hydroxy-dopamine lesioned rats 7–12 chewing movements/min). This behavior persisted for 10 weeks after the last injection of haloperidol decanoate. However, rats with frontal cortex lesions developed a low rate of vacuous chewings (4–8 chewings/min) even without haloperidol administration. Bilateral intrastriatal injections of kainic acid in combination with chronic haloperidol administration did not cause chewing movements in excess of unlesioned haloperidol-treated controls. Pharmacological tests of this animal model for tardive dyskinesia (TD) revealed similarities to human TD, but also differences. Dopamine agonists (apomorphine) and antagonists (haloperidol) both lowered chewing behavior analogous to reported effects on TD and so did gabaculine. The cholinergic drugs physostigmine and pilocarpine, however, increased chewing in rats, while anticholinergics (atropine) reduced it, in contrast to reported effects on human TD.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00431935
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