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Search Results: 1 - 10 of 471332 matches for " Lia A.;Cukiert "
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Manifesta??es clínicas de crises parciais complexas do lobo temporal: um estudo vídeo-eletrencefalográfico
Yacubian, Elza Márcia T.;Valério, Rosa Maria F.;Jorge, Carmem Lisa;Fiore, Lia A.;Cukiert, Arthur;Assis, Luís Marques De;
Arquivos de Neuro-Psiquiatria , 1994, DOI: 10.1590/S0004-282X1994000200001
Abstract: we analysed 27 complex partial seizures arising from the temporal lobes recorded on videotape simultaneously with the eeg emphasizing the motor manifestations specially dystonic posturing, ictal paresis and head and eye forced deviation (version). the temporal lobe origin of the seizures was based on the agreement of many scalp-sphenoidal or zygomatic interictal and ictal eeg recordings, ct and mri findings, interictal and, in some patients, ictal spect studies. 8 patients had surgery. in 5 from 7 patients who had temporal lobectomy, mesial temporal sclerosis was the anatomopathological finding and in one patient who had selective amigdalohippocampectomy,.hemosiderosis and gliosis probably due to bleeding of a posterior cerebral artery giant aneurysm was found. all patients have been seizure free after surgery. while dystonic posturing and ictal paresis, present in 18 seizures(66.6%), were excellent as lateralizing seizure signs, since they were always contralateral to the ictal onset, contralateral and ipsilateral versive head and eye movements were observed.
An evoked potential mapping of transcallosal projections in the cat
Cukiert, A.;Timo-Iaria, C.;
Arquivos de Neuro-Psiquiatria , 1989, DOI: 10.1590/S0004-282X1989000100001
Abstract: in ten adult cats anesthetized with ketamine hydrochloride the neocortex was exposed and rectangular pulses (1msec, 0.5 hz and variable intensity) were applied to discrete points of one side and transcallosal evoked potentials were recorded from the other. the stimulation and recording positions were determined on a cartesian map of most of the exposable neocortical areas and the potentials were analysed as to their components, voltage and latency. passive spread and electrotonic potentials and the effects of increasing frequency were also analysed. the results showed large transcallosal potentials in some areas and an increase of potentials in the caudorostral direction, attaining the highest values in anteromedial areas of the suprasylvian gyrus. confirming anatomical studies, a few silent spots were found in the motor and somesthetic cortex and in restricted posterior regions of the visual cortex, where small or zero voltages occurred. while causing weak contralateral potentials, stimulation of some posterior sites provoked high voltage potentials in anterior regions of the side being stimulated and in the corresponding area of the opposite site. these posterior sites are. poorly interconnected by the corpus callosum. the l-shaped indirect connection described in this work may be involved in some types of epilepsy and may explain the effectiveness of partial callosotomy in their treatment.
Secondary bilateral synchrony associated to a parasagittal tumor case report
Cukiert, A.;Gronich, G.;Marino Jr., R.;
Arquivos de Neuro-Psiquiatria , 1991, DOI: 10.1590/S0004-282X1991000300018
Abstract: a 32 years old woman who had postural limbic and primarily generalized tonic-clonic seizures since the age of 11 presented to us with a ct image strongly suggestive of a mesial meningeoma near the right cingulum. her ictal eeg pattern was characterized by regular 1.5-2.0 hz sharp and slow wave complexes. a right craniotomy was performed under general anesthesia and intraoperative electroencephalographic and electrocorticographic recordings were obtained by means of scalp steel electrodes and modified cerebellar stimulation electrodes, respectively. these recordings demonstrated that surface spikes were often independent from the electrocorticographically recorded ones. before tumor excision, electrical stimulation of the peritumoral mesial cortex resulted in an increase in the epileptic activity. the stimulation of the cavity left after tumor excision led to a prolonged electrographic seizure and neurophysiological procedures were stopped. post-operatively, the patient has remained seizure free for 6 months and her eeg was normal. the pre-, intra- and post-operative findings in this case suggest that the gliotic peritumoral mesial cortex was at least involved in the epileptogenic process.
Electrophysiological evidence for an L-shaped interhemispheric connection in the cat
Cukiert, A;Timo-Iaria, C.;
Arquivos de Neuro-Psiquiatria , 1989, DOI: 10.1590/S0004-282X1989000400001
Abstract: transcallosal potentials evoked by electrical stimulation with rectangular pulses of 1 ms, 5 c/s and variable intensity were recorded from the cortical surface in cats anesthetized with ketamine hydrochloride. sites of stimulation and recording were selected by means of a cartesian map of most of the neocortex. in addition to the well known transcallosal projection pattern it was found that stimulation of a restricted posterior area evokes low voltage potentials over the contralateral symmetric area while high voltage potentials are recorded from a few sites located at the ipsilateral anterior cortex and from the area symmetric as to the latter. this l-shaped transcallosal connection may be involved in complex cortical processes and is compatible with effective results of partial anterior callosotomies in patients with multifocal epilepsy and frontal bisynchronism.
Seizure's outcome after cortical resections including the face and tongue rolandic areas in patients with refractory epilepsy and normal MRI submitted to subdural grids' implantation
Cukiert Arthur,Buratini Jose A.,Machado Elcio,Sousa Alcione
Arquivos de Neuro-Psiquiatria , 2001,
Abstract: PURPOSE: To study the seizure's outcome in patients with refractory epilepsy and normal MRI submitted to resections including the rolandic cortex. METHODS: Four adult patients were studied. All patients had motor or somatosensory simple partial seizures and normal MRI and were submitted to subdural grids' implantation with extensive coverage of the cortical convexity (1 in the non-dominant and 3 in the dominant hemisphere). RESULTS: ECoG was able to define focal areas of seizures' onset in every patient. All patients were submitted to resection of the face and tongue motor and sensitive cortex; two patients had resections including the perirolandic cortex and 2 had additional cortical removals. Three patients are seizures' free and one had a greater then 90% reduction in seizure frequency. CONCLUSION: Resections including the face and tongue rolandic cortex can be safely performed even within the dominant hemisphere.
Considera??es sobre corpo e linguagem na clínica e na teoria lacaniana
Cukiert, Michele;
Psicologia USP , 2004, DOI: 10.1590/S0103-65642004000100022
Abstract: the article discusses the relationship between body and language in lacan's theory and clinic. it discusses critic opinions that with lacan's emphasis on the language, he has separated the subject in psychoanalysis from his corporal reality. finally shows that lacan's proposal of the unconscious structured as a language doesn't mean that he reduces the analytic phenomenon to the symbolic
Functional significance of MRI defined mesial temporal sclerosis in temporal lobe epilepsy
Yacubian, Elza Márcia T.;Cukiert, Arthur;Carrilho, Paulo;Jorge, Carmen Lisa;Fiore, Lia Arno;Buchpiguel, Carlos Alberto;
Arquivos de Neuro-Psiquiatria , 1994, DOI: 10.1590/S0004-282X1994000300002
Abstract: the functional significance of mri-defined mesial temporal sclerosis in temporal lobe epilepsy (tle) is not completely established. in order to study the possible relationship between signals of mesial temporal sclerosis on mri and interictal spect findings we selected 18 patients with complex partial seizures, unilateral temporal eeg focus and normal ct. the eeg focus was defined by the presence of interictal sharp waves and slow background on several scalp eeg obtained during many years of follow up in all patients and by ictal recordings with sphenoidal electrodes in 12 patients. group i comprised patients (n=11) in whom mri showed mesial temporal sclerosis; group ii patients (n=7) had normal mris. all patients were submitted to interictal 99m-tc hmpao injections with concomitant eeg monitoring. lateralized hypoperfusion ipsilateral to the eeg was found in 13 patients (72%). in all group ii and in 6 group i patients a temporal hypoperfusion was found. this spect study showed a higher positivity rate in patients with normal mri than previously reported. on the other hand, in all these group ii patients a neocortical origin of epileptic focus was suspected on clinical or electroencephalographic basis. positive spect findings may be at least as prevalent in neocortical as in mesiolimbic epilepsy.
Congruence of the topography of intracranial calcifications and epileptic foci
Cukiert, A.;Puglia, P.;Scapolan, H.B.;Vilela, M.M.;Marino Jr, R.;
Arquivos de Neuro-Psiquiatria , 1994, DOI: 10.1590/S0004-282X1994000300001
Abstract: nodular intracranial calcifications (nic) are frequent findings in ct scans of epileptic patients in countries where granulomatous central nervous disease such as neurocysticercosis is endemic. in 34 consecutive epileptic patients with nic submitted teo eeg, ct and csf analysis, the correlation between the electroclinical localization of the focus and the topography of the nic was studied. twenty-nine patients had partial (group i) and 5 had primarily generalized seizures (group ii). twenty group i and 1 group ii patients showed abnormal eegs. csf abnormalities consisted of increased protein content (n=3) and positive weinberg's reaction (n=2). in 2 cases, viable neurocysticercotic vesicles were seen. twenty-one patients had single nics. no correlation could be stablished in group ii patients. within group 1,15 patients had a positive and 14 a negative correlation. sixty-six percent of the patients with single nics had negative correlations. these findings strongly suggest that the calcifications themselves are not the epileptogenic lesions in at least 50% of the studied cases.
Dichotic words listening test: technical aspects and results in normal right-handed individuals
Caner-Cukiert, Ana Regina;Cukiert, Arthur;
Arquivos de Neuro-Psiquiatria , 1994, DOI: 10.1590/S0004-282X1994000200009
Abstract: dichotic listening tests have been being used in an increasing frequency to determine in a non-invasive way the cerebral dominance in right- and left-handed patients. this is especially relevant when surgery in eloquent brain areas is being contemplated. a portuguese version of the dichotic words listening test was developed based mainly on wexler's protocol. it consisted of 15 pairs of words with a stimulus dominance lower than 50%. they were recorded using natural voice and time and intensity synchronization by means of a specialized software. each pair of words was presented twice in different channels within each block. the items were randomized and presented with a 300 msec interval between each trial. four blocks of 30 pairs of words each were created, totalizing 120 trials. in the scoring process, the words heard over the right and left ears were wrote down. the number of times each word was heard over each ear was computed and their values subtracted yielding a partial score for each specific word pair. this process was repeated for all stimuli pair and a final score for right and left predominance was then reached. thirty-two right handed normal individuals underwent the test 93.8% showed a right ear advantage. these results are very similar to the actual left hemisphere dominance rate in a right-handed population.
Brain spect in the pre-surgical evaluation of epileptic patients preliminary results
Buchpiguel, Carlos A.;Cukiert, Arthur;Hironaka, Fausto H.;Cerri, Giovani G.;Magalh?es, Alvaro E. A.;Marino Jr., Raul;
Arquivos de Neuro-Psiquiatria , 1992, DOI: 10.1590/S0004-282X1992000100007
Abstract: pre-surgical evaluation of epileptic patients consists of neurological examination, intensive electroencephalographic (eeg) monitoring and anatomical studies (ct and mri). functional methods such as pet and spect imaging are now used more frequently. we have studied pre-operatively 15 adult epileptic patients (8 female, 7 male) using a rotational scintillation camera interfaced to a dedicated computer. the tomographic images were obtained 15 minutes after intravenous injection of 99mtc_hmpao. all had mri scanning and intensive eeg monitoring which generally included seizure recording. five patients had progressive lesions (3 meningiomas, 2 astrocytomas). in 10 patients, neuroradiological studies did not show the presence of progressive lesions (2 normal scans and 8 cases with inactive lesions). two patients with meningioma showed hypoperfusion at the lesion site while the third patient had a marked hyperperfusion which might correlate with the clinical diagnosis of epilepsia partialis continua. in the astrocytoma patients spect scans showed hypoperfusion at the lesion site. data obtained from the 10 patients without progressive cns lesions showed: (a) in 4, spect findings correlated well with the anatomical findings; (b) in 5 instances, spect was able to disclose additional functional deficits; (c) in one case, there was no spect correlate of a discrete anatomical lesion. in 5 of these cases with no progressive lesions (n=10) spect findings were useful as a complementary tool in determining the clinical or surgical management of these patients. despite the small number and hete-rogenicity of the present sample, spect seems to be an useful tool as part of the clinical workup of epileptic patients who are candidates for epilepsy surgery.
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