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Query: UMLS:C0149958 (complex partial seizures)
 2,563 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Sphenoidal electrodes are used to localize epileptiform activity originating in the temporal lobe during complex partial seizures. Sphenoidal electrodes, however, are semi-invasive and uncomfortable to the patient. We compared skin electrodes placed on the cheek ("cheek electrodes") with sphenoidal electrodes for the detection of the side and site of complex partial seizure onset. In a masked, randomized comparison of single ictal recordings in 22 patients, there were no significant differences between sphenoidal and cheek electrode montages in detecting the side or site of ictal onset (P < 0.01). Signal/noise ratios for interictal spikes were a mean 16.5% greater at sphenoidal sites compared to cheek sites (paired t test, t = 2.4, P < 0.05). This difference, however, did not influence the detection of rhythmical ictal activity in cheek and sphenoidal montages in our study, nor the assignment of side, site or time of seizure onset by unbiased readers. Recordings from cheek electrodes are comparable to those from sphenoidal electrodes and are useful for localizing ictal activity.
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PMID:Anterior "cheek" electrodes are comparable to sphenoidal electrodes for the identification of ictal activity. 128 Oct 78

Machado de Assis (1839-1908) is considered the most important Brazilian writer and a great universal literary figure. Little is know about his medical, personal and family history. He hid his "disease" as much as possible. Machado referred to "strange things" having happened to him in his childhood. He described seizures as "nervous phenomena", "absenses", "my illness". Laet observed a seizure and described it as: "... when Machado approached us and spoke to me in disconnected words. I looked at him in surprise and found his features altered. Knowing that from time to time he had nervous problems, ... and only permitted Machado take the Laranjeiras Street car, when I saw that he was completely well". A photographically documented seizure is shown. Alencar wrote, "The preoccupation with health was frequent: either he was having the consequences of a fit or was foreboding one". It is clear that Machado presented localized symptomatic epilepsy with complex partial seizures secondarily generalized of unknown etiology. The seizures which began in infancy or childhood had remission in adolescence and then recurred in his thirties and became more frequent in his later years. His depression got markedly worse with age. In our opinion, the greatest consequence of Machado's epilepsy, was his psychological suffering due to the prejudice of the times. Despite this Machado showed all his genius, which is still actual and universal.
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PMID:Machado de Assis's epilepsy. 130 19

Ralitoline, a thiazolidinone derivative chemically distinct from known antiepileptic drugs, possesses remarkable anticonvulsant properties as demonstrated in various animal models of epilepsy. The efficacy of this compound seems to be comparable or even better than that of conventional antiepileptics. In the present study, the activity of ralitoline was investigated in four seizure models in rodents in order to characterize the anticonvulsant profile of action further. In the maximal electroshock seizure test (mice), this compound showed marked anticonvulsant effects (ED50 2.8 mg/kg i.p.). The efficacy of clinically established anti-epileptics was significantly increased when ralitoline was given as co-medication. In the strychnine seizure test (mice), ralitoline (5 and 10 mg/kg) prolonged the latency of tonic seizures as well as the survival time. On the other hand, in the subcutaneous pentylenetetrazol seizure threshold test (mice), this drug revealed limited protective actions at higher doses and increased the effectiveness of ethosuximide. In unrestrained rats with chronically implanted electrodes, ralitoline (5 mg/kg) significantly reduced the duration of electrically-evoked hippocampal discharges and raised the focal stimulation threshold (10 mg/kg). In the rotorod ataxia test (mice), a TD50 value of 14.5 mg/kg i.p. was determined for ralitoline (protective index TD50/MES-ED50 5.2). With regard to the possible mode of action, whole-cell voltage-clamp experiments on cultured neonatal rat cardiomyocytes showed that ralitoline may act specifically on voltage-sensitive sodium channels. The compound inhibited the fast sodium inward current in a frequency- and voltage-dependent manner. In conclusion, the findings confirm the potent anticonvulsant effects of ralitoline, especially against generalized tonic-clonic and complex partial seizures. Moreover, in combination with antiepileptics, an additive synergism can be found at lower concentrations. Regarding the mode of action, this drug was capable of depressing the fast sodium inward current in cultured heart ventricular cells, suggesting that the local anesthetic properties may be important for the anticonvulsant activity of ralitoline.
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PMID:Anticonvulsant and sodium channel blocking effects of ralitoline in different screening models. 133 17

Although vigabatrin is a promising new antiepileptic drug, its safety has been challenged by the report of dose-dependent central nervous system myelin vacuolation in some preclinical animal studies. Since it has been shown that vacuolation is associated with specific magnetic resonance imaging (MRI) findings in rats and dogs, MRI of the brain was performed in 11 patients with complex partial seizures who had been receiving vigabatrin for 64-78 months (mean 74.0 +/- 5.0 sd) as additional treatment for epilepsy, with a cumulative exposure ranging 4200 to 9360 g. In no case did MRI show white matter changes similar to the pathological findings of microvacuolation observed in animals. These results would appear to confirm that current doses of vigabatrin do not cause myelin vacuolation in humans, even for treatment periods of longer than 5 years.
Seizure 1992 Sep
PMID:MRI findings in epileptic patients on vigabatrin for more than 5 years. 134 61

We report the effect of vigabatrin on seizure frequency in 13 severely drug-resistant patients with intractable complex partial seizures (CPS) with or without secondary generalization. Patients were followed for a 3-month period before vigabatrin administration to establish a 'baseline'. Six patients became seizure free for 2-3 weeks immediately after starting vigabatrin. In seven patients a transient (4-6 weeks) increase in seizures above baseline occurred, which was attenuated by vigabatrin dose increments. After 3 months, the mean baseline CPS frequency was reduced from 7.75 +/- 1.18 (median 8, range 2.6-16) to 2.77 +/- 0.7 (median 1, range 0-7). At 6 months a > 50% improvement remained in seven patients. After 12 or more months CPS frequency returned to baseline in four patients, improved (by 25-62.5%) in four and deteriorated in three. One patient who was seizure free lost control at 16 months. Other effects were drowsiness (3), weight increase (3), diarrhoea (1), depression (2) and mood elevation (2). Four patients discontinued vigabatrin; one because of severe depression, three owing to lack of efficacy. Three patients have undergone and two are awaiting neurosurgery for their epilepsy. Thus, CPS frequency progressively deteriorated toward baseline in all patients, however, secondary generalizations were abolished in four and reduced in two.
Seizure 1992 Sep
PMID:Vigabatrin in the treatment of complex partial seizures. 134 62

In the 1946 film 'A Matter of Life and Death', complex partial seizures were portrayed in detail and with surprising accuracy. This study was conducted to determine the nature of the medical collaboration in the preparation of the film as well as the reasons why the creative team of Michael Powell and Emeric Pressburger included these details, but elected to make them invisible to all but those with medical educations.
Seizure 1992 Dec
PMID:A matter of fried onions. 134 81

The anticonvulsant and behavioural actions of CGP 37849 and CGP 39551, two novel competitive NMDA receptor antagonists, were examined in fully amygdala kindled rats following systemic administration. Only weak anticonvulsant effects were observed following either i.p. or i.v. injection of the antagonists. Moreover, behavioural abnormalities (ataxia, hyperactivity, muscular hypotonia) were apparent at all anticonvulsant doses. These results suggest that CGP 37849 and CGP 39551 may be of limited therapeutic usefulness against complex partial seizures in man, the seizure type showing greatest refractoriness to presently available medication.
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PMID:Weak anticonvulsant activity of CGP 37849 and CGP 39551 against kindled seizures following systemic administration. 135 38

The concentration of somatostatin-like immunoreactivity (SS-LI) was determined by radioimmunoassay in neocortical tissue resected from 20 patients with pharmacologically intractable complex partial seizures. Most resections included either the anterior temporal pole neocortex (15 cases) or cingulate gyrus neocortex (3 cases). The concentration of SS-LI was lowest in cortical tissue immediately adjacent to cortical tumors. Preoperative electrical recordings suggested that this tissue was the seizure focus. In vitro recordings showed that this tissue also exhibited abnormal hyperexcitable synaptic responses. Higher levels of SS-LI, similar to normal values previously reported in human cortex, were present in non-focal temporal neocortical tissue (resected from patients in whom the seizure focus was in the ipsilateral hippocampus) in which no hyperexcitable synaptic activity was present in vitro. The functional loss of inhibitory transmitters suggested by the low SS-LI levels might provide a theoretical basis for the hyperexcitability observed in vivo and in vitro.
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PMID:Low levels of somatostatin-like immunoreactivity in neocortex resected from presumed seizure foci in epileptic patients. 135 61

The phenomenon of seizure clustering is still poorly understood. We therefore investigated 192 patients with temporal lobe epilepsies among whom 60 showed clustering of seizures. The percentage of women was significantly higher in the cluster than in the non-cluster group, the history of epilepsy lasted longer and the excess of complex partial seizures over tonic clonic seizures was more prominent in the cluster group. In 46 out of the 60 patients the clustering did not occur initially but developed in the course of the disease. In a particular subgroup the development initiated with isolated tonic clonic seizures, in a later phase complex partial seizures appeared and finally only complex partial seizures remained. This type of history was found significantly more frequent in the cluster than in the non-cluster group (27% versus 7%). It is conjectured that endogenous, as well as exogenous factors, both of them not completely revealed, cause the occurrence of clusters; anticonvulsant drug therapy might even enlarge this trend. Patients with seizure clustering tend to be pharmacoresistant. Chronic therapy with antiepileptic drugs besides intermittent therapy with benzodiazepines may help. A particular type of seizure clustering is observed in catamenial epilepsies where seizures appear in the perimenstrual and/or periovulatory phase of the menstrual hormonal cycle of females. This type of seizure incidence is obviously influenced by hormonal rhythms. Ten patients suffering from catamenial epileptic seizures were therefore treated with a synthetic analogue of GnRH in order to suppress the menstrual hormonal rhythm. As a result 3 patients became seizure free and in 5 patients seizure frequency decreased.
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PMID:[Etiology, follow-up and therapy of seizure clusters in temporal lobe epilepsy and catamenial epileptic seizures]. 137 77

A small area of deep prepiriform cortex is uniquely susceptible to convulsant and anticonvulsant drugs in the rat. We have studied the pattern of expression of the non-constitutive stress protein (HSP72) following seizures induced by unilateral microinjection of bicuculline into this area. HSP was seen first in ipsilateral dorsal medial thalamus, amygdala and associated piriform cortex, and with more sustained seizures was seen bilaterally in these structures as well as in other projection sites. Neuronal cell death, as assessed by acid-fuchsin staining, occurred in the same brain regions. Frank necrosis was found in the ipsilateral piriform cortex with prolonged seizures. Behaviorally, the seizures induced are characteristic of involvement of the limbic system and, therefore, may be a model of human complex partial seizures.
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PMID:Distribution of HSP72 induction and neuronal death following limbic seizures. 137 69


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