Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0036572 (seizures)
 80,221 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A patient with uncontrolled posttraumatic epilepsy and acute intermittent prophyria was subjected to successive therapeutic trials with phenytoin, carbamazepine, and clonazepam, while eating an adequate diet. Both phenytoin and carbamazepine treatments caused significant increases in porphobilinogen excretion and appeared to induce acute porphyric attacks. In contrast, treatment with clonazepam under rigid dietary control for 10 days caused no increase in porphilbinogen excretion. During the subsequent 7 months of treatment with clonazepam, neither seizures nor porphyric attacks recurred. These findings suggest that clonazepam may be a safe and effective treatment for chronic or severe generalized seizure disorders in patients with acute intermittent porphyria.
 ...
PMID:Posttraumatic epilepsy and acute intermittent porphyria: effects of phenytoin, carbamazepine, and clonazepam. 9 34

Amygdaloid kindling in rhesus monkeys resulted in development of secondarily generalized convulsive seizures in an average of 196 days. Prior pharmacologic (bemegride) kindling accelerated this seizure development in one animal. None of the animals reached the stage 5 primary generalized seizure of baboons (Papio papio), even after 400 daily amygdaloid stimulations. Seizure stage instability, with frequent regression to an earlier stage, and the difficulty of establishing a generalized seizure triggering threshold in most of the rhesus monkeys, contrasts with our experiences in Papio papio. Thus, differences in the speed of kindling and in the quality of kindled convulsion between rhesus monkeys and epileptic baboons probably reflect the presence or absence of an epileptogenic predisposition in these two species. The difficulty of developing convulsive seizure in rhesus monkeys suggests that this species is particularly suited for the study of partial complex seizure. These studies indicate that the abrupt onset of human epilepsy with a fully developed convulsive seizure must represent and overwhelming central pathophysiologic event resulting from an endogenous, exogenous or a combined insult interacting with a genetically predisposed seizure susceptibility.
 ...
PMID:Secondarily generalized convulsive seizures induced by daily amygdaloid stimulation in rhesus monkeys. 10 28

Some important questions concerning the pathogenetical mechanisms of the so-called primary-generalized epileptic seizures are discussed. Reviewing the large literary material and personal clinical experience, the author attracts attention of neurologists and psychiatrists to the necessity of very thorough and detailed anamnestic data and eventual neurological observations, in order to detect a focal onset of a generalized seizure. This is very important bor purposes of clinical practice, especially from the standpoint of indications for neurosurgical operations.
 ...
PMID:[Generalized epileptic seizures]. 11 11

Our observaiton of amygdoloid seizure development in cats indicated early afterdischarge propagation into basal cortical areas prior to the development of bifrontal sharp theta discharge. In view of the implied participation of the frontal lobe in amygdaloid kindling, both fractional lesioning and kindling of selective areas were performed. This paper summarizes out stimulation study involving premotor, prefrontal, mesial frontal and orbital cortices. Except for the orbital series which showed a rather strikingly similar pattern of seizure development to that of amygdaloid kindling, all areas showed significantly different features in terms of the speed of seizure development, afterdischarge propagation, fragility of developing seizure, final stage 5 seizure and post-ictal behavior pattern, interictal discharge morphology and propagation, and generalized seizure triggering threshold intensity. All these findings suggest that the frontal lobe participates in, but is not essential for, the amygdaloid seizure development. The results of ongoing fractional lesion series support such a conclusion.
 ...
PMID:Frontal cortical kindling in cats. 17 10

99 patients with late epilepsy were investigated in our EEG laboratory. In intervals of maximal 100 days (averaged 23 days) a waking EEG recording and a CTAT were carried out. The average age was 43. 62.5% of the pathological CTATs were found in partial seizures with elementary symptomatology. In patients with generalized seizures the diagnosis of symptomatic epilepsy could be made in 20 cases (34%) with the help of computerized tomography. Generalized seizures were related to tumors only in 8.5% in our case material. In 20 of 99 EEGs in our patients there was a continuous delta wave focus, 12 of these with epileptogenic activity. Of these 20 patients, 18 showed a pathological result in computerized tomography. Eight tumors or metastases, 8 cases of atrophy (7 local and 1 diffuse) as well as 1 case of encephalitis could be diagnosed. 12 EEGs showed continuous or intermittent theta wave foci. Computerized tomography never gave a pathological finding in these patients. If one compares the results of CTAT and EEG in cases of tumor, the agreement between positive tomography and the pathological EEG is very high (97%): 33 positive CTATs comapred with 31 positive EEGs. Our investigations with computerized tomography show organic findings in 34 of 99 epilepsies, that is about 34%.
 ...
PMID:Computerized transverse axial tomography (CTAT) in the diagnosis of epilepsy. 40 52

A clinico-electrophysiological study of epileptic patients demonstrated that a significant part of the so-called primary generalized seizures are focal. It was established that the probability of development of a focal subclinical discharge or a generalized seizure may be determined by the degree of an involvement of the mesencephalic reticular formation. The authors stress the topical diagnostis importance of behavioral phenomena, which are expressed on the remote stage of a generalized epileptic seizure.
 ...
PMID:[Clinical neurophysiology of epilepsy (according to findings from stereoelectroencephalographic studies)]. 41 Dec 95

1) Of 267 patients with epilepsy who were examined in our clinic during the period between 1964 and 1966, 97 were investigated in a 10-year follow-up study. The patients were selected according to the following criteria: the age of onset of seizures was 10 years or older and the follow-up period was 10 years after the onset of seizures. Of the 97 patients, 36 were followed up by mail. 2) In the adult 10-year follow-up study, seizures disappeared in 43.3%, decreased in 34.0%, remained unchanged in 16.5%, and were aggravated in 6.2% of the 97 patients. Comparing the five-year follow-up study with the present study, the rate of cases which were free of seizures for three years was 22.7% in the five-year study and 43.3% in this study. The seizures were controlled for at least three years in 22.9% of the cases with partial seizure and in 63.3% of the cases with generalized seizure. The worst prognoses were found in cases with versive seizure in which the seizure was unchanged and/or aggravated in 4 (44.4%) of 9 cases. Of 16 cases with psychomotor seizure, 25% were unchanged or aggravated. 3) Comparing the impaired consciousness seizure with the psychomotor seizure, there was a tendency for the psychomotor seizures to remain as a single type of partial seizure, while the impaired consciousness seizure tended to develop easily into a secondarily generalized seizure. 4) Of the 97 patients, three were personality disorders in 19 cases (19.6%), episodic psychotic state in 2 cases (2.1%), and mental retardation in 6 cases (6.2%). Disorders of mood, irritability and explosiveness associated with personality disorders were improved in three of six cases whose seizures disappeared. Personality disorders were found in half of those cases with partial complex seizures. No correlation was found between mental symptoms and the prognosis of seizures. 5) The EEG was improved in 15 (27.8%) of a total of 54 cases, unchanged in 35 (64.8%) and aggravated in 4 (7.4%). In comparing the prognosis of clinical seizure with changes in the EEG, the seizures improved in 40 (74.1%) of the cases, whereas the EEG improved in only 15 (27.8%) of 54 cases. Most of the clinical seizures were controlled or decreased, whether the EEG improved or not.
 ...
PMID:A 10-year follow-up study of 97 epileptics. 47 91

Sustained, generalized seizure activity was induced in anaesthetized (70% N2O), paralyzed and artifically ventilated rats by i.p. DL-homocysteine thiolactone in a dose of 11 mmol/kg. Epileptic discharges in the EEG were accompanied by marked perturbation of tissue metabolites. There was a fall in phosphocreatine concentration to 40% of control but only moderate changes in adenine nucleotides, a marked rise in lactate concentration, and a pronounced increase in the lactate/pyruvate ratio. Excessive amounts of dihydroxyacetone phosphate (and glyceraldehyde phosphate) accumulated, indicating that depletion of NAD+ occurred. There was marked accumulation of ammonia, glutamine and alanine, and reduction in glutamate and aspartate concentrations. Administration of a subconvulsive dose of homocysteine (7.5 mmol/kg) gave rise to changes in ammonia and amino acids, qualitatively similar to those occurring during seizures. It is concluded that although changes in the metabolites of the energy reserve were mainly caused by the induced seizures, those affecting amino acid concentrations were significantly influenced by accumulation of ammonia, secondary to metabolism of injected homocysteine. Cerebral blood flow (CBF) and oxygen utilization (CMRO2) were measured during sustained seizures. CMRO2 rose to 150% of control, with a corresponding increase in CBF.
 ...
PMID:Cerebral metabolic and circulatory changes in the rat during sustained seizures induced by DL-homocysteine. 50 26

Frontal kindling in rabbits, prolongation of the duration of afterdischarge concomitant and clinical manifestations and the epileptic foci (primary and independent secondary foci) were revealed. Auditory and visual evoked responses were recorded after completion of the kindling phenomenon. 1. Electrical stimulations, 300 microA, 60 Hz. 1 msec in duration, 2 sec train, were applied once a day. Clinical manifestations were divided into five stages: 1) the arrest of behavior or no response, 2) the adversive movement with a tonic and/or clonic convulsion of left paw, 3) the adversive movement following mastication, facial spasms and postictal stupor, 4) falling down abruptly and generalized convulsive seizure, and 5) generalized seizure followed by rotatory movement, vocalization and myoclonus. The appearance of five generalized convulsions was defined as a completion of the kindling phenomenon. 2. The duration of afterdischarge increased stepwisely from 2--3 sec to more than 400 sec. However, there was no constant duration of AD even though the animal showed generalized convulsion after completion of the kindling phenomenon. 3. Visual and auditory evoked responses were recorded after completion of kindling. There was a change in the auditory evoked response but not in the visual. A shortening of the latency of P2 component (73.3 msec in peak latency), N2 component (146.7 msec in peak latency) and amplification of the amplitude of N2 component were noticed. Thus, the intermittent weak electrical stimulation on the frontal cortex in rabbits induced generalized convulsion and produced primary and independent secondary epileptic focus on EEG, and the change of auditory evoked response was recognized in kindled animals.
 ...
PMID:Frontal kindling in rabbits and its influence on visual and auditory evoked response. 53 39

Computerized tomography (CT) was performed on 256 children with seizure disorders. The incidence of abnormal scans was closely related to seizure type, and permitted separation of patients into a low-yield and a high-yield group. Low-yield groups included children with idiopathic generalized seizures, children in whom both the neurologic examination and electroencephalogram (EEG) were normal, and children with a generalized seizure of unknown etiology in whom the neurologic examination and the EEG were normal. The high-yield groups included children with partial seizures with elementary symptomatology, partial seizures with complex symptomatology, generalized seizures with known etiology, neonates with seizures, and children whose seizures began as neonates. The overall incidence of abnormalities in the entire group was 33 percent. An abnormal neurologic examination increased the incidence of abnormal CT scans to 64 percent. EEGs were abnormal in 65 percent of the children, but only focal slowing resulted in a significant increase in the incidence of abnormal CT scans. Seven children (2.7 percent) had intracranial abnormalities requiring surgery. If the neurologic examination and EEG were normal, the yield of abnormal CT scans was only 5 percent of the total.
 ...
PMID:Computed tomography and childhood seizure disorders. 57 94


1 2 3 4 5 6 7 8 9 10 Next >>