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Query: UMLS:C0036572 (seizures)
 80,221 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The authors retrospectively identified 17 children with Down syndrome who developed infantile spasms, and analysed their etiology, EEG findings, response to medication, development and prognosis. Compared with symptomatic infantile spasms in the general population, which have a poor prognosis, these patients had a relatively benign outcome with regard to seizure control: only three of 16 survivors currently have seizures and seven of the 16 currently receive anticonvulsants. Developmental outcome was poorest in those with a superimposed hypoxic insult and in those who regressed developmentally at the onset of the spasms and did not regain developmental milestones. The overall neurological prognosis for children with Down syndrome and infantile spasms appears to be better than for children with infantile spasms in the general population.
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PMID:Infantile spasms in children with Down syndrome. 803 19

Although epilepsy is more common in persons with trisomy 21 (Down syndrome) than in the general population, the mechanisms by which seizures are generated in this population have received little attention. It is likely that this increased seizure susceptibility is due to a combination of medical risk factors and inherent neurologic abnormalities characteristic of Down syndrome. In this review clinical aspects of seizures among individuals with Down syndrome were described and possible mechanisms by which the trisomy 21 brain may generate seizures were explored.
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PMID:Epilepsy in Down syndrome: clinical aspects and possible mechanisms. 810 31

Fluoxetine is a relatively new antidepressant, reported to have minimal side-effects. Seizures associated with fluoxetine therapy are uncommon. The five cases reported so far are reviewed. A case of fluoxetine induced seizures, in a person with Down syndrome, is described.
Seizure 1993 Dec
PMID:Seizures associated with fluoxetine therapy. 816 1

We investigated the etiology of West syndrome (WS) with special reference to prenatal factors in 180 cases. Prenatal cause was the most frequent diagnosis (77 cases, 42.8%), followed by perinatal (25 cases, 13.9%) and postnatal factors (12 cases, 6.7%); 48 cases (26.7%) were of uncertain etiology; eighteen cases (10.0%) were idiopathic. Of the three forms of age-dependent epileptic encephalopathy, prenatal cause was present in 12 of 15 cases (80.0%) of early-infantile epileptic encephalopathy with suppression-burst, 77 of 180 cases (42.8%) of WS, and 31 of 123 cases (25.2%) of Lennox-Gastaut syndrome (LGS). Prenatal factors of WS included tuberous sclerosis (23), chromosome abnormalities (10), cerebral dysgenesis (10), porencephaly (7), hydrocephalus (5), Aicardi syndrome (3), Aicardi syndrome associated with chromosome abnormality (1), and other causes (18). Chromosome abnormalities with WS consisted of 6 cases with 21 trisomy and one case each with 18q duplication, t(1;y) translocation, 7q duplication, and partial 2p trisomy. One patient with Aicardi syndrome also had a t(12;21) translocation. No significant difference was observed in the age of onset of WS among the five etiologic groups. The evolution from WS to LGS was not influenced by etiology, except for the idiopathic group. In patients followed for over 3 years, seizure remission occurred in 46.8% (22 of 47 cases) of the prenatal group. This was lower than the other four groups. Intellectual prognosis was also relatively poor in those with prenatal onset. Pyridoxal phosphate (PAL-P) treatment was effective in 9 of 70 (12.9%) prenatal cases and 5 of 18 (27.8%) idiopathic cases.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Prenatal etiologies of West syndrome. 833 May 83

Some chromosomal abnormality syndromes carry a higher risk of seizures than that found in the general population. Down's syndrome is considered to be the first and the most frequent chromosomal abnormality causing mental retardation. In spite of numerous reports and epidemiological surveys, the outcome of epileptic syndromes in patients with Down's syndrome (DS) is still largely unknown. We retrospectively studied 34 DS patients with epilepsy (14M; 20F). Epileptic syndromes were classified as: infantile spasms, 10 cases, i.e. 31%; Lennox-Gastaut syndrome, 5 cases, 15.5%; symptomatic generalized epilepsy, 1 case; idiopathic generalized epilepsy, 6 cases, 17.6%; partial symptomatic epilepsy, 10 cases, i.e. 31%. In 2 patients the epilepsy was unclassifiable. In all the patients the following evolutive particularities were noted: a) the infantile spasms to have a relatively mild prognosis, as 8/10 patients remained seizure-free, 3 of whom without treatment; b) no patient experienced febrile convulsions prior to the onset of epilepsy; c) Lennox-Gastaut syndrome had a relatively late onset (mean age 10 years, range 8-11.5); d) 7 patients (20.6%) developed reflex seizure. The fragile X syndrome is considered to be the second most frequent chromosomal abnormality causing mental retardation. The prevalence of epilepsy varies from 9.1% to 45% in the different series. In order to evaluate the prevalence rate of epilepsy and the previously hypothesized association with a particular electroclinical picture, we retrospectively studied 90 fragile X syndrome patients (80M, 10F) aged 4 to 25 years (mean age 13y6m).(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:[The evolution of epilepsy in the most common genetic forms with mental retardation (Down's syndrome and the fragile X syndrome)]. 841 89

Widespread inquiry identified 378 adults with Down's syndrome resident in Leicestershire, England. The immediate carer of 351 of these (92.8%) was interviewed for the purpose of establishing a past history of seizures, including the age at which the seizures began. The immediate carer was also invited to provide information to enable the completion of an Adaptive Behaviour Scale (A.B.S.) rating. Individuals with a history of seizures were divided into two groups on the basis of whether or not seizures commenced prior to or after age 35 years. Two control groups of individuals with Down's syndrome, but without a history of seizures were selected. Adaptive Behaviour Scale scores for those in whom seizures commenced at a younger age were similar to those who had no recorded history of seizures. However, in those in whom seizures began in later life, scores on all domains of the A.B.S. were significantly reduced compared to both young epileptic patients and their controls. Adaptive Behaviour Scale scores for the older control group held an intermediate position, suggesting that late-onset epilepsy may be a late manifestation of a dementing process. A clinical diagnosis of dementia recorded in the case records was significantly associated with the presence of late-onset epilepsy. This is supportive of the hypothesis that late-onset epilepsy in individuals with Down's syndrome is associated with Alzheimer's disease.
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PMID:Epilepsy, dementia and adaptive behaviour in Down's syndrome. 848 13

A unique patient with Down syndrome who developed reflex seizures is described. The patient has had recurrent intermittent seizures for the past 3.5 years. These seizures were usually precipitated by auditory stimuli such as sudden loud noises. While having seizures the patient experienced severe discomfort in the posterior neck area. The seizures usually lasted 10-20 s, and there was no aura, nor was there a postictal phase. Of the numerous investigations performed, closed-circuit electroencephalogram video telemetry was most helpful in arriving at an accurate diagnosis. Carbamazepine administration resulted in total seizure control and reflex stimuli no longer provoke seizure activity. Although it has been suggested that reflex seizures may be due to genetic factors or structural central nervous system defects, we were unable to uncover the cause of the reflex seizures in our patient.
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PMID:Reflex seizures in Down syndrome. 848 39

The model that will based any specialized attention in any healthy area depends the necessity of special and primary cares and the criteria of specialized practitioners on the type of patients what should be treated. We interview following a questionnaire on that question the neurologists of Valencian Community in order to know their opinion. The questionnaire includes 47 neurological topics and we ask the percentage of patients who should be evaluated as first visit and as follow-up visits. We used the formula proposed by Kurtzke in 1986 in order to calculate the neurological time. The response rate obtained was 30%. The whole neurological time was 4,600 hours per 100,000 inhabitants yearly, that means 6.9 neurologists-type per 100,000 inhabitants. These data suggest that Valencian neurologists agree a model of direct neurological care, including diagnosis and follow-up of all neurological topics. These data are similar to that obtained in interviews to primary physicians in different healthy areas in the Community and confirms the evolution of neurological care to a model similar to that in the United States. The topic that require more than 100 hours by year are: migraine (1,731) lumbar backache (685), stroke (306), seizures (248), Down's syndrome (175.5), alcoholism (150), zoster (122), severe cranial trauma (105) and dementia (103).
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PMID:[The model of neurological care needs in Valencian community. Commission of the analysis of the quality of SVN]. 855 2

We report the case of a patient with trisomy 21 (T21) with late onset epilepsy. The electroclinical features were of myoclonic jerks on awakening and generalised tonic clonic seizures, with generalised spike and wave on EEG, and a progressive dementia. As familial Alzheimer's dementia and progressive myoclonic epilepsy (Unverricht-Lundborg type) are both linked to the chromosome 21, this case may represent a distinct progressive myoclonic epilepsy related to T21.
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PMID:Myoclonic epilepsy of late onset in trisomy 21. 872 75

A prevalence study of epilepsy in patients with Down syndrome (n = 85) in three age-groups (14-16 years, 23-29 years, 50-60 years) was conducted in the county of Aarhus, Denmark. Seventy-two patients (85%) participated. An interview and a neurological examination were performed. An EEG was recorded in 50 patients. Twelve patients (17%) had epilepsy. ILAE-1981-classification: two with partial seizures, seven with primary generalized and three with unclassifiable generalized seizures. Two patients with epilepsy had a normal EEG and 13 patients without epilepsy had an abnormal EEG.
Seizure 1996 Jun
PMID:Epilepsy in Down syndrome--prevalence in three age groups. 879 27


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