testosterone/seizures

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Testosterone modulation of seizure susceptibility is mediated by neurosteroids 3alpha-androstanediol and 17beta-estradiol.

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Testosterone modulates seizure susceptibility in animals and humans, but the underlying mechanisms are obscure. Here, testosterone modulation of seizure susceptibility is hypothesized to occur through its conversion to neurosteroids with "anticonvulsant" and "proconvulsant" actions, and hence the

Aromatase inhibition, testosterone, and seizures.

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The effect of testosterone on brain excitability is unclear. The excitatory aspect of testosterone's action in the brain may be due to its conversion to estrogen via aromatase. We report herein a 61-year-old man with temporal lobe epilepsy and sexual dysfunction due to low testosterone levels. Use

Stable carbon isotope ratio profiling of illicit testosterone preparations--domestic and international seizures.

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Gas chromatography-combustion-isotope ratio mass spectrometry (GC-C-IRMS) is now established as a robust and mature analytical technique for the doping control of endogenous anabolic androgenic steroids in human sport. It relies on the assumption that the carbon isotope ratios of naturally produced

The role of substantia nigra pars reticulata in modulating clonic seizures is determined by testosterone levels during the immediate postnatal period.

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GABAergic activation of substantia nigra pars reticulata (SNR) at postnatal day (PN) 15 has sex-specific features on seizure control in vivo and electrophysiological responses in vitro. In males, the GABA(A)-receptor agonist muscimol has proconvulsant effects and induces depolarizing responses. In

Testosterone and its metabolites affect afterdischarge thresholds and the development of amygdala kindled seizures.

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In boys with epilepsy, pubertal increases in seizure frequency may be associated with rising androgen levels. The present study tested the hypothesis that testosterone (T) and/or its metabolites might affect amygdala seizure thresholds and the development of secondary generalization from amygdala

Gonad-brain relationship: effects of castration and testosterone on electroshock convulsions in male rats.

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[Effect of castration and subsequent administration of testosterone propionate on susceptibility to convulsions in animals].

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[The effect of DCA compound E testosterone, progesterone and ACTH in modifying agene-induced convulsions in dogs].

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Sex-specific control of flurothyl-induced tonic-clonic seizures by the substantia nigra pars reticulata during development.

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The substantia nigra pars reticulata (SNR) plays an important age- and sex-specific role in control of clonic seizures. Its involvement in control of tonic-clonic seizures is contradictory. We investigated the role of the SNR in the tonic-clonic seizures induced in male, female and neonatally

Influence of sexual hormone antagonists on the anticonvulsant action of conventional antiepileptic drugs against electrically- and pentylenetetrazol-induced seizures in mice.

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The present results refer to the action of three gonadal steroid antihormones, tamoxifen (TXF, an estrogen antagonist), cyproterone acetate (CYP, an antiandrogen) and mifepristone (MIF, a progesterone antagonist) on seizure phenomena in mice. TXF and CYP at their lowest protective dose in the

Steroid hormone effects on picrotoxin-induced seizures in female and male rats.

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Picrotoxin (1 mg/kg, i.p.), evoked a single generalized seizure in 75% of ovariectomized rats. Pretreatment of matched pairs with silastic implants containing 100% estradiol had an anticonvulsant effect; it protected all rats against such seizures. Implants containing 10% estradiol in cholesterol

Effect of antihormones in amygdala-kindled seizures in rats.

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Tamoxifen (TXF; an antiestrogen), cyproterone acetate (CYP; an antiandrogen) and mifepristone (MIF; an antigestagen) did not affect kindling parameters (afterdischarge threshold, seizure severity, seizure duration and afterdischarge duration) in fully-kindled rats. TXF (50 mg/kg) and CYP (50 mg/kg),

Influence of sex hormone antagonists on the anticonvulsant action of conventional antiepileptic drugs against amygdala-kindled seizures in male and female rats.

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The effects of three gonadal steroid antihormones, tamoxifen (TXF, an estrogen antagonist), cyproterone acetate (CYP, an antiandrogen) and mifepristone (MIF, a progesterone antagonist) alone or combined with conventional antiepileptics were evaluated in amygdala-kindled seizures in male and female

Seizure disorder in the men of a Veterans Administration nursing home.

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This study examined the descriptive epidemiology of seizure disorder in 129 male residents of a Veterans Administration Nursing Home. Eighty-seven of the residents were institutionalized because of nonpsychiatric disorders (60 for chronic neurologic diseases, and 27 for other medical conditions).

Tolerance to the anticonvulsant activity of midazolam and allopregnanolone in a model of picrotoxin seizures.

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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.

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