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muscarine/crise épileptique
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[The role of acetylcholine in the pathogenesis of seizure states of different etiologies].
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Experiments were performed on rats to study the dynamics of changes in some parameters characterizing the state of the cholinergic part of the nervous system during the development of convulsions induced by various convulsants. It is concluded that, depending on its concentration in the synaptic
Acetylcholine modulates respiratory pattern: effects mediated by M3-like receptors in preBötzinger complex inspiratory neurons.
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Perturbations of cholinergic neurotransmission in the brain stem affect respiratory motor pattern both in vivo and in vitro; the underlying cellular mechanisms are unclear. Using a medullary slice preparation from neonatal rat that spontaneously generates respiratory rhythm, we patch-clamped
Chemical kindling by muscarinic amygdaloid stimulation in the rat.
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507 Holtzman rats received injections, through chemitrodes chronically implanted into the basolateral amygdala, of 0.2-1 microliter of sterile isotonic solution containing nanomolar quantities of cholinergic muscarinic agonists and/or antagonists. The bulk of the injected solution diffused only a
Kindling: a pharmacological approach.
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Injection of a few nanomoles of the muscarinic agonists carbamylcholine, muscarine or (+)-acetyl-beta-methylcholine once a day into the rat amygdala was initially subconvulsive, but on repetition led to the progressive development of kindled epileptic seizures. This behaviour was stereospecific, was
Prolonged psychosis after Amanita muscaria ingestion.
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Amanita muscaria has a bright red or orange cap covered with small white plaques. It contains the isoxazole derivatives ibotenic acid, muscimol and muscazone and other toxins such as muscarine. The duration of clinical manifestations after A. muscaria ingestion does not usually exceed 24 hours; we
Formation and function of eicosanoids in the central nervous system.
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Neuronal firing during experimental convulsions triggered a large increase in brain eicosanoid synthesis. Mature astrocytes are an important source of cerebral prostanoids. Endogenously formed prostaglandins possess anticonvulsive properties of biological relevance. These conclusions suggest new
Evidence of central cholinergic mechanisms in the appearance of affective aggressive behaviour: dissociation of aggression from autonomic and motor phenomena.
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Carbachol, muscarine, eserine and neostigmine injected into the cerebral ventricles of conscious cats evoked emotional behaviour with aggression, autonomic and motor phenomena as well as clonic-tonic convulsions. The main and the most impressive feature of the gross behavioural effects of
Unintentional ingestion of Cordyceps fungus-infected cicada nymphs causing ibotenic acid poisoning in Southern Vietnam.
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BACKGROUND
Cordyceps fungus found in infected cicada nymphs ("cicada flowers") is utilized in traditional Chinese medicine. Cordyceps fungus toxicity in humans has not been previously reported. We report 60 cases of apparent Cordyceps poisoning in Southern Vietnam.
METHODS
We retrospectively
Changes in populations of cholinergic binding sites in brain after chronic exposure to barbital in rats.
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Male rats were treated with barbital in their drinking fluid for about 40 weeks (daily dose 200 mg/kg). The treatment was stopped on day 0 and the number of muscarinic binding sites was measured in 3 brain parts (striatum; cortex and hippocampus; medulla oblongata and midbrain) during the abstinence
Acetylcholinesterase loosens the brain's cholinergic anti-inflammatory response and promotes epileptogenesis.
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Recent studies show a key role of brain inflammation in epilepsy. However, the mechanisms controlling brain immune response are only partly understood. In the periphery, acetylcholine (ACh) release by the vagus nerve restrains inflammation by inhibiting the activation of leukocytes. Recent reports
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