Browse Items · NEOMED Bibliography Database

Sharing of sensory terminals between the dynamic bag1 and static bag2 fibers in the rat muscle spindle.

The nuclear bag1 intrafusal fiber mediates the dynamic (velocity) sensitivity, whereas the nuclear bag2 and nuclear chain fibers mediate the static (length) sensitivity of muscle spindles to stretch. The pattern of branching of primary and secondary…

Tags: 1987, Afferent/*ultrastructure, Animals, Axons/ultrastructure, Brain research, Female, Inbred Strains, Kucera J, Muscle Spindles/*ultrastructure, Nerve Fibers/*ultrastructure, Neurons, Rats, Walro J M

Spinal beta-endorphin analgesia involves an interaction with local monoaminergic systems.

beta-Endorphin administered intrathecally (i.t.) in rats produced a dose-dependent elevation in tail-flick latency. Naltrexone administered i.t. as a pretreatment reversed the spinal antinociceptive action of beta-endorphin, suggesting that the…

Stability of the stimulus properties of drugs over time.

Three separate groups of rats were trained to discriminate the stimulus effects of either 600 mg/kg ethanol (n = 5), 0.8 mg/kg d-amphetamine (n = 8) or 1.0 mg/kg

Tags: *Discrimination (Psychology), 1989, Animals, Boja J W, Dextroamphetamine/*pharmacology, Dose-Response Relationship, Drug, Drug Tolerance, Ethanol/*pharmacology, Inbred Strains, Pharmacology, biochemistry, and behavior, Piperazines/*pharmacology, Rats, Schechter M D, Signs S A

Striatal dopamine release in vitro from immature male rats shows enhanced responsiveness to pulsatile, but not continuous, infusions of L-dopa.

In the present experiment we compared the effects of continuous versus pulsed infusions of L-beta-3,4,dihydroxyphenylalanine (L-DOPA) upon dopamine and 3,4-dihydroxyphenylacetic acid (DOPAC) release in vitro from superfused corpus striatal tissue…

Tags: 1991, 3, 4-Dihydroxyphenylacetic Acid/metabolism, Aging/*metabolism, Animals, Brain research. Developmental brain research, Corpus Striatum/*metabolism, Dluzen D, Dopamine/*metabolism, Inbred Strains, Levodopa/*administration & dosage/pharmacology, Male, McDermott J, Pulsatile Flow, Rats

Tamoxifen abolishes estrogen's neuroprotective effect upon methamphetamine neurotoxicity of the nigrostriatal dopaminergic system.

The effects of 17beta-estradiol and the anti-estrogen, tamoxifen, on methamphetamine-induced neurotoxicity of the nigrostriatal dopaminergic system were examined in ovariectomized CD-1 mice. In Experiment 1, striatal dopamine concentrations from…

Tags: 2001, Animals, Corpus Striatum/chemistry/*drug effects/metabolism, Dluzen D E, Dopamine/analysis/*metabolism, Estrogen Antagonists/*pharmacology, Estrogens/blood/*pharmacology, Female, Gao X, Inbred Strains, Methamphetamine/*toxicity, Mice, Neuroprotective Agents/pharmacology, Neuroscience, Ovariectomy, Substantia Nigra/chemistry/*drug effects/metabolism, Sympathomimetics/*toxicity, Tamoxifen/*pharmacology

Tamoxifen diminishes methamphetamine-induced striatal dopamine depletion in intact female and male mice.

It has been demonstrated that the nigrostriatal dopaminergic system of male mice is more sensitive to the neurotoxic effects of methamphetamine (MA). The basis for this difference can be related to oestrogen, which has the capacity to function as a…

Tamoxifen increases methamphetamine-evoked dopamine output from superfused striatal tissue fragments of male mice.

The antiestrogen, tamoxifen (TMX), has been shown to function as a neuroprotectant against the nigrostriatal dopaminergic (NSDA) neurotoxin, methamphetamine (MA), within male mice. In the present report, we examined the effects of a combined infusion…

Tags: 2004, Animals, Brain research, Corpus Striatum/*drug effects/*metabolism, Dluzen Dean E, Dopamine Agents/*pharmacology, Dopamine Plasma Membrane Transport Proteins, Dopamine/*metabolism, Drug Synergism, Estrogen Antagonists/*pharmacology, Inbred Strains, Male, Membrane Glycoproteins/metabolism, Membrane Transport Proteins/metabolism, Methamphetamine/*pharmacology, Mice, Nerve Tissue Proteins/metabolism, Tamoxifen/*pharmacology, Willett Matthew C

Temporal differences in behavioral effect of fenfluramine and norfenfluramine.

Ten male rats were trained to discriminate the anorectic drug d,l-fenfluramine (2.0 mg/kg intraperitoneally administered) from its vehicle using a food-reinforced (fixed-ratio 10 schedule) two-lever operant task. Once learned, the fenfluramine…

Tags: 1990, Animal/*drug effects, Animals, Behavior, Discrimination Learning/*drug effects, Dose-Response Relationship, Drug, Fenfluramine/*analogs & derivatives/*pharmacology, Inbred Strains, Injections, Intraperitoneal, Male, Norfenfluramine/*pharmacology, Pharmacology, biochemistry, and behavior, Rats, Schechter M D, Stereoisomerism

Temporal parameters of cathinone, amphetamine and cocaine.

Rats were trained to discriminate intraperitoneally administered 0.8 mg/kg

Tags: 1989, Alkaloids/*pharmacology, Amphetamines/*pharmacology, Animals, Cocaine/*pharmacology, Conditioning, Discrimination (Psychology)/*drug effects, Inbred Strains, Male, Operant/*drug effects, Pharmacology, biochemistry, and behavior, Rats, Schechter M D, Task Performance and Analysis, Time Factors

Tetrahydro-beta-carboline may produce its stimulus effects via 5HT1B receptors.

To further clarify the role of 5-hydroxytryptamine (5HT) in the behavioral effects of tetrahydro-beta-carboline, male rats were trained to discriminate either 20 mg/kg THBC from its vehicle (n = 10) or 2.0 mg/kg fenfluramine from saline (n = 5). THBC…

Tags: 1987, Animals, Carbolines/*pharmacology, Discrimination Learning/drug effects, Inbred Strains, Male, Metergoline/pharmacology, Pharmacology, biochemistry, and behavior, Piperazines/pharmacology, Rats, Receptors, Schechter M D, Serotonin Antagonists/pharmacology, Serotonin/*metabolism

The acute effects of methylenedioxymethamphetamine on dopamine release in the awake-behaving rat.

The effects of the recently classified Schedule I amphetamine analog, 3,4-methylenedioxymethamphetamine [+/-)-MDMA) on caudate and nucleus accumbens dopamine release and metabolism were studied by in vivo voltammetry and HPLC with electrochemical…

Tags: 1988, 3, 4-Dihydroxyphenylacetic Acid/metabolism, 4-methylenedioxyamphetamine, 4-Methylenedioxyamphetamine/analogs & derivatives/*pharmacology, Amphetamines/*pharmacology, Animals, Brain/drug effects/metabolism, Caudate Nucleus/drug effects/metabolism, Consciousness, Dopamine/*metabolism, European journal of pharmacology, Inbred Strains, Male, N-Methyl-3, Nucleus Accumbens/drug effects/metabolism, Rats, Spanos L J, Yamamoto B K

The antinociceptive effects of 3,4-methylenedioxymethamphetamine (MDMA) in the rat.

The antinociceptive effects of MDMA and morphine were examined in rats using the tail-flick and hot-plate analgesiometric tests. MDMA, in the dose range of 1.5-6.0 mg/kg IP, produced a dose-dependent elevation in hot-plate latency, but did not…

The development of long-term potentiation in hippocampus and neocortex.

The development of long-term potentiation (LTP), an enduring alteration in synaptic efficacy following afferent activation, was examined in CA1 hippocampus and primary visual cortex of rat. Both regions show little LTP prior to postnatal day 5,…

The effects of anticonvulsant drugs on NMDA-EPSP, AMPA-EPSP, and GABA-IPSP in the rat hippocampus.

The effects of phenobarbital, phenytoin, and valproic acid on pharmacologically isolated NMDA-EPSP, AMPA-EPSP, and GABA-IPSPs were examined in rat hippocampal slices. Phenobarbital (0.05 mg/ml) had no effect on the NMDA-EPSP, but decreased the slope…

Tags: 1997, alpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic Acid/*pharmacology, Animals, Anticonvulsants/*pharmacology, Brain research bulletin, Brown-Croyts L M, Electrophysiology, gamma-Aminobutyric Acid/*pharmacology, Hippocampus/*drug effects/physiology, Inbred Strains, Ko G Y, Male, N-Methylaspartate/*pharmacology, Phenobarbital/pharmacology, Phenytoin/pharmacology, Rats, Teyler T J, Valproic Acid/pharmacology

The JCR:LA-cp rat: a novel rodent model of cystic medial necrosis.

Although there are multiple rodent models of the metabolic syndrome, very few develop vascular complications. In contrast, the JCR:LA-cp rat develops both metabolic syndrome and early atherosclerosis in predisposed areas. However, the pathology of…

The role of dopamine and serotonin receptors in the mediation of the ethanol interoceptive cue.

The drug discrimination paradigm was used to evaluate the contribution of dopamine or serotonin receptors in the mediation of the stimulus properties of ethanol. Briefly, rats were trained to discriminate between ethanol (600 mg/kg, IP) and water…

Tags: 1988, Animals, Conditioning, Cues, Discrimination (Psychology)/*physiology, Dopamine/drug effects/*physiology, Dose-Response Relationship, Drug, Ethanol/*pharmacology, Inbred Strains, Male, Operant/physiology, Pharmacology, biochemistry, and behavior, Rats, Receptors, Schechter M D, Serotonin/drug effects/*physiology, Signs S A

Time-dependent effect of ethanol upon discrimination behavior.

The discriminative stimulus properties produced by ethanol were employed to demonstrate differences in discriminative performance over time in rats trained at different postinjection times. Thus, one group of rats was trained to discriminate between…

Tags: 1989, Alcohol (Fayetteville, N.Y.), Animals, Discrimination (Psychology)/*drug effects, Dose-Response Relationship, Drug, Ethanol/*pharmacology, Inbred Strains, Male, Rats, Schechter M D, Time Factors

Browse Items (97 total)