Stran 1 iz 31 rezultatov
The effects of an intracerebroventricular (i.c.v.) administration of a non-selective full benzodiazepine receptor agonist, midazolam, and a neuroactive steroid, allopregnanolone, on picrotoxin-induced seizures and striatal dopamine metabolism, were studied in mice. It was found that acute i.c.v.
In vivo differential pulse voltammetry using an electrochemically treated carbon fiber electrode was applied to the investigation of the in vivo release of indoleamine and catecholamine within the caudate nucleus of freely moving and immobilized rats during convulsions induced by pentylenetetrazole
High doses of the muscarinic cholinergic agonist pilocarpine are a useful model for investigation of the essential mechanisms for seizure generation and spread in rodents. Pilocarpine (400 mg/kg; subcutaneously) was administered in 2-month-old female rats, and the content of striatum monoamines and
The organophosphate chemical nerve agent, soman, causes convulsions, neuropathology, and, ultimately, death. A major problem in treating soman intoxication is that peripherally acting pharmacological agents which prevent death do not prevent seizures. Although a primary cause of these symptoms is
Behavioural, histopathological and neurochemical changes induced by systemic injection of kainic acid (10 mg/kg, s.c.) were investigated in rats. The most pronounced behavioural changes were strong immobility ("catatonia"), increased incidence of "wet dog shakes", and long-lasting generalized
This study examined brain regional neurotransmitter level changes as a function of seizure duration following soman intoxication. Rats, implanted with cortical electrodes and pretreated with HI-6, received a convulsant dose of soman. At selected times after seizure onset the EEG recording electrodes
The tremor mutant phenotype results from an autosomal recessive spontaneous mutation arisen in a Swiss-Webster mouse colony. The mutant mice displayed normal development until three weeks of age when they began to present motor impairment comprised by whole body tremor, ataxia, and decreased
Amino acid and monoamine concentrations were examined in tissue extracts of caudate nucleus of genetic substrains of BALB/c mice susceptible or resistant to audiogenic seizures. Amino acids [aspartate, glutamate, glycine, taurine, serine, gamma-aminobutyric acid (GABA)], monoamines, and related
Behavioural, neurochemical and histopathological changes induced by systemic injection of kainic acid were investigated at various doses of the neurotoxin (3, 6 and 10 mg/kg s.c.). There was a positive correlation between the dose of kainic acid and the extent of both the acute neurochemical changes
Antimuscarinic drugs possessing antiparkinson activity that were effective in preventing convulsions induced by the organophosphorus cholinesterase (ChE) inhibitor soman were studied for their effects on spinal cord ChE activity and striatal levels of acetylcholine (ACh) and catecholamines in
An investigation was made into the relationship between dopaminergic and EEG effects of gamma-butyrolactone (GBL) by comparing time-course and dose-response studies of these two actions of gamma-butyrolactone in rats implanted with permanent cortical electrodes. Dopaminergic effects were assessed by
The effects of phenobarbital (PB; doses, 5, 10, and 25 mg/kg, intraperitoneally (i.p.)) and zonisamide (ZNS; doses, 30, 75, and 150 mg/kg, i.p.) on nitric oxide (NO) production, and those of coadministration of PB (5 mg/kg, i.p.) and ZNS (75 mg/kg, i.p.) on monoamines in the brain of the
OBJECTIVE
To evaluate cerebrospinal fluid (CSF) catecholamine (CA) and its metabolites in encephalitis patients in acute and convalescent period and correlate these with clinical and magnetic resonance imaging (MRI) features.
METHODS
Patients with acute encephalitis diagnosed on the basis of
Thallium, a rodenticide, has been shown to produce several neurological symptoms including motor weakness, ataxia, tremor, convulsion, coma and death. The present study was designed to evaluate the effects of acute or subacute exposure to thallium on several neurochemical biomarkers in rat brain. In
The effect of clonidine, an alpha 2-agonist, on ischemia-induced alterations in brain catecholamine and metabolite levels was studied in Mongolian gerbils subjected to 180 min of unilateral cerebral ischemia. The gerbils were randomly assigned to four treatment groups: sham-operated or unilateral