The term "psychedelic" applied to "altered states of consciousness" would imply that such subjective anomalies are direct expressions of normal psychological functioning. The anomaly in such experience would depend in the first instance on sensitization to qualities of immediate subjective state. Such sensitization should in itself be considered nonadaptive, cutting off the "intentionality" of...
Lysergic acid diethylamide=25 (LSD) and N,N-dimethyltryptamine (DMT) abolish food-rewarded, fixed-ratio bar pressing by rats in a dose-related fashion. Adult male Holtzman rats trained to press a bar (respond) for milk reward on a 4-response fixed-ratio schedule were given i.p. injections of 3.2 or 10 mg/kg of DMT every 2 hours for 21 days. Every 24 hours the animals were placed in operant...
The course of active avoidance learning of rats in a symmetrical Y-maze under the influence of 1, 3, and 9 mg/kg of delta 9-THC i.p., and 5, 20, and mug/kg of LSD was investigated. Delta-THC in a dosage of 1 mg/kg had no effect on avoidance learning. Three to a lesser extent 9 mg/kg produced more rapid learning with a significantly better performance. Learning under delta 9-THC proved to be...
The classical conditioning potential of several drugs was tested in rats by pairing a light CS with the drug UCSs; these stimuli were superimposed in a variable-interval 30 sec schedule for water reinforcement. Conditioning (suppression of bar-pressing in the presence of the CS) was definitely demonstrated with psilocybin (2.0 mg/kg), was suggested but not clearly shown with LSD (0.13 MG/kg),...
Rats were trained in a T-shaped maze to discriminate the effects produced by i.p. injections of tetrahydrocannabinol (THC) and the no-drug state (state-dependency, StD). Several doses of both Δ^8-THC (range: 0.75–5.0 mg/kg) and Δ^9-THC (range: 0.75–10.0 mg/kg) were used in order to compare the number of sessions required by the animals until reaching criterion performance. An additional group...
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...
Meditation may have clinical application in stress-related disorders or it may alleviate the adverse effects of normal daily stress, depending on the resiliency of demonstrated state effects. The significance of meditation as a stress intervention appropriate for daily life might prove major if these meditation state effects carry over and transform the meditator in a more permanent way,...
Psychopharmacology1976Sergio Solbes Ferri, A. Santagostino, P. C. Braga6 citations
Some effects of intraventricular injection of mescaline are examined in conscious rabbits. By means of electrical stimulation of the tooth pulp it is shown that an acute treatment with 70, 100, 150 mug/kg of mescaline elicits analgesia, the intensity of which is dose-dependent: with daily administration of 100 mug/kg for 5 days a complete tolerance develops to the antinociceptive effect. A...
Abstract Von Psilocin konnten drei polymorphe Modifikationen dargestellt werden, die sich durch ihr Verhalten beim Kristallisieren und Schmelzen sowie durch ihre IR‐Spektren unterscheiden. Mod. I schmilzt bei 170–173°, Mod. II bei 161°, Mod, III wird immer umgewandelt; ihr Schmp. konnte nicht bestimmt werden. Diese Form läßt sich dagegen durch ihr IR‐Spektrum sehr gut charakterisieren....
Male albino rats were trained to respond differentially on the left or right lever in a 2-lever chamber on the basis of which drug had been given intra-peritoneally (IP) 30 min before experimentation. In 1 group 1.9 mg/kg of delta9-THC and control injections (vehicle) served as the discriminative stimuli associated with each lever and in another group the drug stimuli were 1.0 mg/kg of...