Abstract
The present study was primarily designed to explore the relationship between phencyclidine(PCP)-induced hyperactivity and the mesolimbic dopamine (DA) system. In addition, the motor-activating and behavioral effects of amphetamine (1.5 mg/kg), SKF-10,047 (25.0 mg/kg), scopolamine (1.0 mg/kg), and caffeine (10.0 mg/kg) were also measured and compared to PCP action. While all compounds produced a moderate to large degree of hyperactivity with varying time courses for effect, gross behavioral observations indicated a greater similarity between PCP and SKF-10,047 than between any of the other drugs. Following bilateral 6-hydroxydopamine lesions of the nucleus accumbens the robust locomotor-stimulating action of 5 mg/kg PCP was significantly reduced. Such lesions also successfully prevented amphetamine- and SKF-10,047-induced hyperactivity, but not the behavioral activation produced by scopolamine or caffeine. These results suggest that PCP and SKF-10,047, like amphetamine, elicit locomotor activity through presynaptic DA mechanisms within the mesolimbic system.
Original language | English (US) |
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Pages (from-to) | 83-88 |
Number of pages | 6 |
Journal | Psychopharmacology |
Volume | 82 |
Issue number | 1-2 |
DOIs | |
State | Published - Dec 1983 |
Externally published | Yes |
Keywords
- Amphetamine
- Caffeine
- Locomotor activity
- Nucleus accumbens
- Phencyclidine (PCP)
- SKF-10,047
- Scopolamine
ASJC Scopus subject areas
- Pharmacology