Parietal focal spikes evoked by contralateral tactile somatotopic stimulation in four non-epileptic subjects

Marco, P. De; Negrin, P

doi:10.1016/0013-4694(73)90257-5

Cited by 38 publications

(17 citation statements)

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“…As previously described (De Marco and Negrin, 1973), the method consisted of tapping the heel with a reflex hammer for five consecutive taps at intervals of approximately 1 sec. The heel region of first one foot and then of the other was tapped systematically.…”

Section: Methodsmentioning

confidence: 99%

Extreme Somatosensory Evoked Potential (ESEP): An EEG Sign Forecasting the Possible Occurrence of Seizures in Children

Marco

Tassinari²

1981

Epilepsia

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In a population of 15,000 children, it was found that tactile stimulation, mainly tapping o n the soles or heels of the feet, could elicit high-voltage evoked potentials in the EEGs of 1% of them. A longitudinal study of 16 of these patients showed a stereotyped electroclinical evolution. At first, only extreme somatosensory evoked potential (ESEPs) were observed in nonepileptic children with normal EEG records first period). Then, after a variable delay, spontaneous EEG abnormalities appeared, first only during sleep, and then also during wakefulness, usually as spikes involving the same parietal and midline regions where the ESEPs were evident (second and third periods). Seizures then began Vi,urth period) within 5 months to 2 years after the appearance of the interictal focal abnormalities. Such seizures were rare, but in some cases they were grouped in bouts that amounted to status epilepticus. The seizures were usually of the partial motor type, with adversion of the head, but infrequently they assumed the tonic-clonic type; they occurred mainly during the daytime. The fits were short-lived, however, and after a year had mostly disappeared, while the ESEPs and spontaneous interictal focal abnormalities sometimes persisted for several years before disappearing, too. The subjects were otherwise neurologically and psychologically normal throughout the observation and follow-up period.High-voltage potentials evoked by a single somatosensory stimulus are widely known to occur in the EEG of patients with focal seizures (Dawson, 1947; Forster et al., 1949; Gastaut and Alajouanine, 1955; Tassinari, 1968; Green, 1971). These are usually related to a lesion involving somatosensory areas. De Marco (1971), however, reported the occurrence of large evoked potentials in five nonepileptic patients without neurological evidence of cerebral organic lesions. The potentials, which were evoked by heel tapping monoor bilaterally, appeared on the surface EEG recording as focal spikes involving the parietal and parasagittal regions, each spike being evoked by a single stimulation, usually of the contralateral foot (De Marco and Negrin, 1973).' This paper describes our attempt to determine the clinical relevance

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Section: Methodsmentioning

confidence: 99%

Extreme Somatosensory Evoked Potential (ESEP): An EEG Sign Forecasting the Possible Occurrence of Seizures in Children

Marco

Tassinari²

1981

Epilepsia

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“…Podemos observar que na faixa etária de 2 a 7 anos as PE apareceram em 7,26% das crianças com CF. A localização das PE foi parietal (P , P ou P ) em 12 dos 13 casos, Marco 3,5,7,8,9,21^ pesquisando sistematicamente pela percussão e estímulos táteis principalmente dos pés, obteve PE em cerca de 1% dos casos. Grande parte das crianças com PE buscaram atendimento por distúrbios de comportamento e/ou escolaridade e parte por CF e crises não febris repetidas, mas sem natureza reflexa.…”

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Pontas parietais evocadas ao eletrencefalograma e convulsões febris

Fonseca

1988

Arq. Neuro-Psiquiatr.

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RESUMO -Foi feita a pesquisa de pontas evocadas ao eletrencefalograma pela percussão dos pés e mãos em 2307 crianças de 2 a 15 anos de idade. Foram encontradas pontas evocadas em 69 (2,99%). Convulsões febris ocorreram em 226 casos e dentre esses 13 apresentaram pontas evocadas. Foi verificada associação de convulsões febris e pontas evocadas particularmente naquelas crianças em que havia atividade epileptiforme, principalmente de localização parietal. São feitos comentários sobre a importância desses achados em relação à compreensão da natureza da atividade epileptiforme em crianças com convulsões febris, assim como em relação às possíveis implicações prognósticas. Evoked parietal spikes in the electroencephalogram and febrile convulsions.SUMMARY -In a population of 2307 children, 69 (2.99%) showed in the EEG high-voltage evoked potentials (evoked spikes) elicited by tapping on the feet or hands. Febrile convulsions were mentioned in 226 cases, and 13 of them showed the evoked spikes in the EEG and were otherwise neurologically and psychologically normal. Association between febrile convulsions and evoked spikes was observed, mainly when EEG showed also epileptiform activity of parietal localization. These EEG features are propably of functional rather than organic nature, and with possible genetic mechanisms involved. Longitudinal studies of children with febrile convulsions and evoked spikes in the EEG are necessary to verify a possible high risk of developing epilepsy not predicted on clinical data.

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“…These types of epilepsy are present exclusively within the first 15 years of life in patients with a history of seizures, linked to a genetically transmitted predisposition to epilepsy. From an electroclinical standpoint they are represented by: 1) benign infantile epilepsy "with rolandic paroxysms" (EPR);3-7, 12 2) benign infantile epilepsy with affective seizures and temporal spikes (EPT);13 3) benign infantile epilepsy with occipital spike waves (EPO).9-11 These forms occur frequently in our experience. Other cl inical entities, belong ing to the group of "functional" partial epilepsies have been recently described.…”

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confidence: 93%

The Benign Infantile Epilepsies with Evoked Spikes

DeMarco¹

1985

Clinical Electroencephalography

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The International Classification of the Epilepsies defines two types of generalized epilepsies: primary (mainly functional) and secondary (organic) and only one type of partial epilepsy, (organic). Recent studies show the existence of a group of "functional" or "mostly functional" partial epilepsies. Among these, a particular place is occupied by the benign infantile epilepsies "with evoked spikes," described during the last 10 years. These are forms with a very particular development, characterized in all cases by 4 typical phases; the last one is the clinical phase with epileptic seizures. The prognosis is very good. The discussion concerns the similarities and the differences between these epilepsies versus the other partial benign epilepsies.

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Parietal focal spikes evoked by contralateral tactile somatotopic stimulation in four non-epileptic subjects

Cited by 38 publications

References 4 publications

Extreme Somatosensory Evoked Potential (ESEP): An EEG Sign Forecasting the Possible Occurrence of Seizures in Children

Extreme Somatosensory Evoked Potential (ESEP): An EEG Sign Forecasting the Possible Occurrence of Seizures in Children

Pontas parietais evocadas ao eletrencefalograma e convulsões febris

The Benign Infantile Epilepsies with Evoked Spikes

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