title: The stereotyped behavior syndrome: a new model and proposed therapy.
abstract: The stereotyped behavior syndrome was induced in rats through local impairment of inhibitory GABA-ergic mechanisms in both caudate nuclei by bilateral microinjection of tetanus toxin, penicillin, or picrotoxin into the rostral part of the caudate nucleus. Intraperitoneally injected haloperidol suppressed the syndrome; this effect was dose-dependent. The same effect on the tetanus toxin-induced stereotyped behavior was produced by GABA microinjected bilaterally into the rostral part of the caudate nucleus of unrestrained rats. It was found in this model of tetanus toxin-induced stereotyped behavior that lithium chloride and diazepam can suppress the syndrome. Combined application of lithium chloride, diazepam, and haloperidol in minimal effective doses resulted in a much more complete and longer-lasting suppression of the syndrome than the separate use of these drugs. This effect is attributed to the joint specific actions of the drugs on pathogenetically interrelated components of a hyperactive determinant structure that arises in the caudate nuclei after impairment of the GABA control and this is responsible for the stereotyped behavior syndrome.
mesh_terms: D000818:Animals; D003975:Diazepam / Q000494:pharmacology; D004347:Drug Interactions; D006220:Haloperidol / Q000494:pharmacology; D006801:Humans; D008094:Lithium / Q000494:pharmacology; D008297:Male; D008960:Models, Psychological; D010406:Penicillins / Q000494:pharmacology; D010852:Picrotoxin / Q000494:pharmacology; D051381:Rats; D013239:Stereotyped Behavior / Q000502:physiology*; D013744:Tetanus Toxin / Q000494:pharmacology; D005680:gamma-Aminobutyric Acid / Q000494:pharmacology
chemical_list: D003975:Diazepam; D006220:Haloperidol; D008094:Lithium; D010406:Penicillins; D010852:Picrotoxin; D013744:Tetanus Toxin; D005680:gamma-Aminobutyric Acid