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Search Results: 1 - 10 of 718218 matches for " M.A.;Fonseca "
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Epilepsia com pontas centrotemporais e com pontas parietais: estudo comparativo
Fonseca, Lineu Corrêa;Tedrus, Gloria M.A.;
Arquivos de Neuro-Psiquiatria , 1995, DOI: 10.1590/S0004-282X1995000200004
Abstract: there are controversies about the existence of a benign parietal epilepsy distinct from the benign partial epilepsy with centro-temporal spikes. we studied 164 children with no neurological or neuroradiological evidence of brain damage and with epilepsy and spikes restricted to the centro-temporal (cts) or to the parietal regions (ps). the subject's age, age at onset and type of seizures and the presence of spikes evoked by consecutive taps applied to both hands and feet were compared between 111 patients with cts and 53 patients with ps. age of patients and age at onset of seizures predominated until 6 years in the ps group and after 6 years in the cts group. the occurrence of oropharyngeal or facial motor seizures was statistically more frequent among the patients with cts (44.1%) as opposed to ps group (16.9%). in 39.5% of the children with ps and only in 3.5% of those with cts, the eeg showed high voltage potentials, similar to the habitual spikes in clinical eeg, evoked by the stimulation of one or both feet or hands. our findings suggest that in neurologically normal children with epilepsy, the group with ps differs from those with cts in the age, age at onset and type of seizures and eeg reactivity to percussion of hands and feet.
Paroxismos occipitais após o fechamento dos olhos: correla??es clínico-eletrencefalográficas em 24 casos
Fonseca, Lineu Corrêa;Tedrus, Glória M.A.;
Arquivos de Neuro-Psiquiatria , 1994, DOI: 10.1590/S0004-282X1994000400009
Abstract: paroxysms of high-amplitude spike-waves or sharp waves recurring rhythmically on the occipital areas when the eyes are closed (poec) are primarily observed in childhood epilepsy with occipital paroxysms (ceop). an association of this electroencephalographic (eeg) pattern with idiopathic epilepsy has been disputed. we studied eeg and clinical features in 24 patients (age ranging from 3 to 25 years) with poec. the eeg showed generalized discharges in 8 cases, rolandic spikes in 4 and background abnormalities in 4 cases. eigtheen (75%) patients manifested epileptic seizures. the nonfebrile seizures (16 cases) were partial (9 cases), generalized (6 cases) and unclassified (one patient). two children had neurological examination or computed tomography abnormalities. clinical and eeg data allowed for the following epileptic syndromes diagnosis: ceop, 7 cases; benign childhood epilepsy with centrotemporal spikes, one case; ceop or benign childhood epilepsy with centrotemporal spikes, one case; partial symptomatic/cryptogenic epilepsy, 4 cases; generalized idiopathic, 2 cases; febrile convulsions, 2 cases. we conclude that poec may be observed in cases with different types of idiopathic partial, cryptogenic/symptomatic and idiopathic generalized epilepsies and may also occur in patients with no seizures.
Epilepsia occipital benigna da infancia de início precoce (tipo Panayiotopoulos): aspectos clínicos e eletrencefalográficos evolutivos em 14 crian?as
Fonseca, Lineu Correa;Tedrus, Gloria M.A.S.;
Arquivos de Neuro-Psiquiatria , 2005, DOI: 10.1590/S0004-282X2005000300018
Abstract: we studied clinical and electroencephalographic features of 14 children, age range of 2 -8 years, with no neurological or neuroradiological evidence of brain damage and with occipital epileptiform activity in the eeg. seizures were numerous in 3 cases. age at onset was between 1-7 years. in 4 cases the seizures last for more than 20 min. spikes were observed in 6 cases and spike and slow-wave complex in 8. discharges blocking by eyes opening were confirmed in 4 cases. somatosensory evoked spikes by foot stimulation were observed in 2 cases. autonomic and versive seizures are the main clinical manifestations of panayiotopoulos syndrome. discharges blocking by eyes opening are a less frequent feature.
Hemibalismo como manifesta??o inicial da síndrome de imunodeficiência adquirida: descri??o de caso
Tedrus, Gloria M.A.;Albertin, M. Cristina;Fonseca, Lineu C.;
Arquivos de Neuro-Psiquiatria , 1994, DOI: 10.1590/S0004-282X1994000200020
Abstract: there are few descriptions of movement disorders as an initial presentation of acquired immunodeficiency syndrome (aids). the authors report the case of a 54-year-old man who presented with hemiballismus of gradual onset. the computed axial tomographic scan showed a deep seated enhancing lesion with mass effect. investigation revealed aids and a probable toxoplasmosis. it is concluded that aids must be considered in the aetiological diagnosis of patients with movement disorders.
Epilepsias idiopáticas focais occipitais da infancia: estudo de 63 casos
Tedrus, Gloria M.A.S.;Fonseca, Lineu Corrêa;
Arquivos de Neuro-Psiquiatria , 2005, DOI: 10.1590/S0004-282X2005000100012
Abstract: we studied clinical-eeg features of 63 children, age range of 2-14 years, with occipital epileptiform activity in the eeg, with epileptic seizures and no evidences of brain damage. age at onset was between 1-12 years. in 15 cases the seizures last for more than 30 min up to 6 h. seizures occurred during sleep in 28 children. autonomic symptoms were apparent in 25, head deviation in 24 and hemiconvulsion or generalization in 17 cases. ten children reported visual symptoms. in 14 children the seizures were exclusively generalised convulsions. spikes were observed in 27 cases and spike and slow-wave complex in 36. discharges blocking by eyes opening were confirmed in 15 cases. somatosensory evoked spikes by foot stimulation were observed in 9.5% cases. the cases were classified in the following idiopathic epileptic syndromes: early-onset occipital - panayiotopoulos-type (eoo), 32 cases; late-onset occipital - gastaut type (loo), 8; rolandic epilepsy in 7. conclusion: eoo occurred more frequently than loo. idiopathic occipital syndromes diagnosis was possible in 63.4% of the cases.
Potencial evocado somato-sensitivo em crian?as com pontas evocadas por estímulo somato-sensitivo no eletrencefalograma
Tedrus, Gloria M.A.S.;Fonseca, Lineu Corrêa;
Arquivos de Neuro-Psiquiatria , 2004, DOI: 10.1590/S0004-282X2004000300013
Abstract: objective: to study the characteristics of somatosensory evoked potential (sep) cortical components in children with evoked spikes (es) on eeg. method: the children were aged 7-12 years, had normal neurological examination and neuropsychomotor development, and did not present signs/symptoms of cns lesions. data were compared within a group of 20 "normal" children. results: the amplitude of the cortical components n75 and p98, obtained by posterior tibial nerve stimulation, was higher in es groups as compared with the normal group. conclusion: high amplitude sep (n75 and p98) has higher values in the group of children with es than in the normal group. the exact mechanism involved in the genesis of es and high amplitude sep is not clear yet. a possible mechanism would be focal cortical hyperexcitability related to functional activity. no difference was observed in sep components in children with es considering occurrence or not of epilepsy. therefore, sep does not bring elements to distinguish between the groups suffering or not epilepsy.
Atividade epileptiforms occipital com ou sem bloqueio pela abertura dos olhos: estudo comparativo clínico-eletrencefalográfico
Fonseca, Lineu Corrêa;Tedrus, Glória M.A.S.;
Arquivos de Neuro-Psiquiatria , 1995, DOI: 10.1590/S0004-282X1995000500002
Abstract: occipital epileptiform activity blocked by eyes opening (oeab) is primarily observed in childhood epilepsy with occipital paroxysms but may be also found in cases of benign childhood epilepsy with centrotemporal spikes, cryptogenic/symptomatic partial epilepsies, idiopathic generalized epilepsies and in patients with no seizures. we studied comparatively eeg and clinical features of 20 patients with oeab and 120 patients with occipital epileptiform activity not suppressed by eyes opening (oea). epileptiform activity (oea or oeab) was registered until the 7 years of age in 67.5% of the patients with oea and in 45% of the patients with oeab. epileptic seizures began before 4 years of age in 44.4% of the cases with oea and in 14.2% in the group oeab. febrile convulsions alone occurred only in the oea group (12.5%). developmental retardation was referred in 27 patients with oep. the occurrence of spike and wave complexes was statistically more frequent among patients with oeab (80.0%) as opposed to patients with oea (17.5%), our findings suggest clinical and electroencephalographic differences between children with oea and oeab.
Event related potentials during the visual discrimination of words and pseudowords by children
Fonseca, Lineu C.;Tedrus, Gloria M.A.S.;Gilbert, Maria Agnes P.;
Arquivos de Neuro-Psiquiatria , 2006, DOI: 10.1590/S0004-282X2006000400002
Abstract: event related potentials (erps) in reading were studied in children in a word and pseudoword discriminating task. seventy-nine children (9 to 11 year old), all with no elements suggesting brain injury and with school performance compatible with their age were studied. the erp were registered as there were presented, visually, successively and in a random manner, 100 words and 100 pseudowords. for each stimulus the child pressed a key corresponding to the discrimination between word and pseudoword. the register was carried out for the electrodes of the 10-20 system and the mean amplitudes and latency peaks measured and also the amplitude from 200 to 550 milliseconds. the most significant differences between the erps occurred in cz, with greater negativity for the mean of the amplitude between 425 and 550 milliseconds for pseudowords (n400). the n400 was more precocious in 11 year old. the influence of age was thus evident and also the differences in erps between words and pseudowords.
Aflatoxin removal of peanut meals with aqueous ethanol
Fonseca, H.;Regitano-d'Arce, M.A.B.;
Scientia Agricola , 1993, DOI: 10.1590/S0103-90161993000100021
Abstract: a preliminary approach to achieve compatible simultaneous extraction of aflatoxin and residual oil from pressed oil meals was conducted to determine the minimum amount of water to be added to ethanol versus necessary time to achieve complete removal of aflatoxin. commercial anhydrous, 96, 93 and 90°gl ethanol were utilized in trials with soxhlet extractors. commercial anhydrous ethanol did not remove aflatoxin completely and the extraction efficiency in minutes was directly proportional to the amount of water present in the ethanol, as expected. although 96°gl ethanol was efficient, alcoholic strengths between 96 and 99°gl need be evaluated to improve oil extraction, provided they do not decrease aflatoxin removal efficiency.
Event related potentials during the visual discrimination of words and pseudowords by children
Fonseca Lineu C.,Tedrus Gloria M.A.S.,Gilbert Maria Agnes P.
Arquivos de Neuro-Psiquiatria , 2006,
Abstract: Event related potentials (ERPs) in reading were studied in children in a word and pseudoword discriminating task. Seventy-nine children (9 to 11 year old), all with no elements suggesting brain injury and with school performance compatible with their age were studied. The ERP were registered as there were presented, visually, successively and in a random manner, 100 words and 100 pseudowords. For each stimulus the child pressed a key corresponding to the discrimination between word and pseudoword. The register was carried out for the electrodes of the 10-20 system and the mean amplitudes and latency peaks measured and also the amplitude from 200 to 550 milliseconds. The most significant differences between the ERPs occurred in Cz, with greater negativity for the mean of the amplitude between 425 and 550 milliseconds for pseudowords (N400). The N400 was more precocious in 11 year old. The influence of age was thus evident and also the differences in ERPs between words and pseudowords.
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