Comparison of the action of lysergic acid diethylamide and apomorphine on the copulatory response in the female rat
Mona Eliasson, Bengt J. Meyerson
Psychopharmacology January 1, 1976 DOI: 10.1007/bf00426833 via Springer Nature
Summary
Lysergic acid diethylamide (LSD) and apomorphine both inhibited lordosis behavior in ovariectomized estrogen- and progesterone-treated rats in a dose-dependent manner with similar time courses. Pimozide blocked the apomorphine-induced decrease but only partially reduced the LSD-induced inhibition. Chlorpromazine had a similar effect on LSD inhibition. The predominant action of LSD on female copulatory behavior is not mediated by increased dopamine receptor activity; instead, the LSD effect might be modulated by decreased dopaminergic activity.
Study at a glance
| Characteristics | Experimental study Peer reviewed |
|---|---|
| Population | Ovariectomized estrogen + progesterone-treated rats |
| Topics | LSD Serotonin |
| Keywords | Copulatory behavior Apomorphine Pimozide |
| Citations | 34 |
| Key finding | LSD's inhibition of lordosis is not primarily due to increased dopamine receptor activity but may involve decreased dopaminergic activity. |
Abstract
The effects of lysergic acid diethylamide (LSD) and apomorphine were compared using female copulatory behavior (lordosis response), in ovariectomized estrogen + progesterone-treated rats. Both serotonin and dopamine are implicated in the inhibition of this behavior. Each compound inhibited lordosis behavior dose dependently and with a similar time-course. Pimozide (0.1; 0.5 mg/kg) blocked the apomorphine (0.2 mg/kg)-induced decrease of lordosis response, while only a certain abbreviation of the LSD (0.10 mg/kg) inhibition was achieved by pimozide (0.5 mg/kg). Chlorpromazine (0.5 mg/kg) in a dose without effects on lordosis of its own had an action similar to pimozide on the LSD effect. It is concluded that the predominant action of LSD on the female coupulatory response is not mediated by increased dopamine receptor activity but that the LSD effect might be modulated by decreased dopaminergic activity.