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Electrical stimulation of dorsal and dorsolateral periaqueductal gray (PAG) and internal capsule (IC) sites in the rat elicited tail flick and formalin test stimulation-produced analgesia (SPA). SPA from PAG sites was associated with aversion. SPA from IC sites was associated with aversion,
The effects of central norepinephrine depletion produced by DSP-4 on drug-induced catalepsy and pot-decapitation convulsions were examined in the rat. Haloperidol-induced catalepsy was potentiated in DSP-4 treated rats, while arecoline-induced catalepsy was attenuated. Furthermore, post-decapitation
OBJECTIVE
To study the behavioral depression induced by a generalized limbic seizure and by an opioid. The hypothesis that an opioid fentanyl and an amygdala-evoked seizure induced behavioral depression through the nucleus accumbens was tested.
METHODS
The behavioral depression induced by an
Within outbred Wistar stock, the pendulum movements are found to be inherited in what may be considered as a dominant mono- or oligogenic mode of inheritance with incomplete penetrance. This indicates that the albinism only permits the manifestation of the pendulum movements, which are also
Outbred Wistar rats were selectively bred for predisposition to catalepsy for 16 generations. The rats predisposed to catalepsy are characterized by an increased (in an unselected control population) or decreased (in S13) motor activity, decreased defecation scores, and elevated blood pressure.
Phenotypical study was carried out in rats with pendulum movements. The animals exhibited a high level of abortive seizures in response to audiogenic stimuli and longer postictal catalepsy in comparison with those in Wistar population. Seizure severity positively correlated with the duration of
N-Cyclopropylmethyl-[7alpha,8alpha,2', 3']-cyclohexano-1'[S]-hydroxy-6,14-endo-ethenotetrahydronororip avine (BU48) is a novel, ring-constrained analog of buprenorphine. In vivo, BU48 (0.1-10 mg/kg s.c.) produced brief, nonlethal convulsions in mice followed by brief Straub tail and a short period
Microinjections of 2-10 micrograms of carbachol into the mesencephalic reticular formation (MRF) and pontine reticular formation (PRF) of rats consistently induced local electroencephalographic seizures. These seizures had organized, rhythmical patterns and were long lasting. They spread powerfully
Relationships between the predispositions to pendulum movements (PMs), catalepsy, and audiogenic epilepsy in the course of breeding for "nervousness" and freezing have been studied. A positive genetic relationship between PMs, catalepsy, and audiogenic epilepsy has been demonstrated. Eighty to
Proportion of animals which developed pinch-induced catalepsy and the duration of this state were analyzed in rats of several genotypes which differed in audiogenic epilepsy proneness and compared with "audiogenic" catalepsy after a sound-induced seizure fit. The following genotypes were studied:
Female Balb-C mice received glutamic acid palmitamide (PGt) or linoleamide (LGt) at doses included between 10 and 135 mg.kg-1 (i.p.) and, 90 min after these injections, pentetrazol (PTZ) at 90 mg.kg-1, i.p. PGt (10 or 100 mg.kg-1, i.p.) reduced significantly latencies of first convulsions and
(RS)-alpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) was microinjected into the lateral brain ventricle of conscious rats in order to evaluate its pharmacological effects. Microinjection (5 microliter) were made unilaterally and the effects of AMPA were assessed for 6 hr. AMPA
Potentiation of adenosinergic inhibitory modulation is one of possible strategies to develop new antiepileptic drugs. Nonspecific receptor agonist 2-chloroadenosine was tested against pentetrazol-induced convulsions in immature (7, 12, 18 and 25 days old) and adult rats. Doses of 1-15 mg/kg i.p.