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Results for “Epilepsy, Reflex”

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At least 109 records · Page 6Linked to original sources
PubMed2003

Reflex epilepsy and non-ketotic hyperglycemia.

Epileptic seizures are paroxysmal events, and it is likely that many, if not most, of them are precipitated by known or unknown factors acting on a central nervous system that is predisposed to the production of epileptic discharges by the presence of an organic lesion, a genetically determined neuronal hyperexcitability, or both. Known precipitating influences are quite varied. We report the case of a 58 years-old patient, followed for non-ketotic hyperglycemia, who presented with focal seizures exclusively induced by specific, active or passive, postures and movements of the right arm or hand. MRI was normal. Following regulation of glucose blood levels the position-induced seizures stopped and antiepileptics were not prescribed. The seizures are kept under control by regulating blood glucose.

Blood Glucose↗
PubMedDate not supplied

[Advances in our knowledge of the causation and pathophysiology of reflex epilepsies].

AIMS: In recent years our knowledge of the pathophysiology and aetiology of reflex seizures and epilepsies has advanced significantly due to the contributions made by modern functional neuroimaging and neurophysiology techniques, as well as the findings of research being conducted in molecular biology. The aim of our review is to summarise and integrate these contributions in order to describe the current state of our knowledge on the subject. DEVELOPMENT: The fundamental pathophysiological pattern is common to all types of reflex epilepsy and is based on the existence of a hyperexcitable cortical or subcortical neuronal area that can respond to a physiological stimulus in an exaggerated manner. This focal hyperexcitability may derive from a predisposing genetic substrate (idiopathic reflex epilepsy) or from a focal cortical lesion (lesional reflex epilepsy). Some genetic substrates have been reported in isolated families and there are many candidate genes, but we still do not know enough about the genetic base. The lesion-based aetiology is very heterogeneous, but disorders affecting cortical development are the lesions with the greatest capacity to cause reflex epilepsy. Clinical expression is conditioned by the topography of the lesion and not by the type of underlying lesion. CONCLUSIONS: Future characterisation of reflex epileptic seizures and syndromes must include a diagnosis centred around three axes, that is, topographic, lesional and genetic.

Animals↗
PubMed2005

Transfer of an avian genetic reflex epilepsy by embryonic brain graft: a tissue autonomous process?

Electroencephalographic characteristics and clinical symptoms of an avian genetic reflex epilepsy have been transferred from Fayoumi epileptic (Fepi) chickens to non-epileptic chickens by embryonic homotopic grafts of brain neuroepithelium. Transplanted tissues belonging to the prosencephalic vesicle transferred epileptic electrical features while tissues from the mesencephalic vesicle were responsible for seizure motor manifestations of the disease. Thus each of these tissues can express their own specificity when grafted separately in a normal host, but they co-operate to produce the complete epileptic phenotype when grafted together.

Animals↗
PubMedDate not supplied

Reflex epilepsy induced by calculation using a "Soroban," a Japanese traditional calculator.

We report three cases of reflex epilepsy with myoclonic jerks of the right arm and fingers precipitated by calculation using a Soroban. An EEG spike-wave complex with left central prevalence was induced. Various types of stimulation were used to induce epileptic discharges, and a simultaneous mental task requiring a high degree of concentration and complicated and delicate finger movements was necessary to induce the epileptic discharges. Comparison of our cases with previously reported reflex epilepsy induced by higher mental activity led to the assumption that the neural mechanism inducing seizures in our cases is similar to that of writing epilepsy. Valproate was effective in reducing epileptic discharges, and all patients became seizure-free.

Cerebral Cortex↗
PubMed1984

[Reflex epilepsy: study of 5 cases].

Five clinical cases of reflex epilepsy with the EEG records during the seizure are provided. A review of the clinical aspects and EEG characteristics of these epilepsies is made. Its physiopathology is discussed and the findings compared to those in the literature.

Adolescent↗
PubMedDate not supplied

[Reflex epilepsy from hot water: a new case and review of the literature].

INTRODUCTION: In approximately 5% of epilepsy patients, seizures are triggered off by a specific sensory stimulus, in other words, they have reflex epilepsies. Among these, seizures triggered off by hot water are exceptional, and especially so in our community as nearly all the cases have been reported as occurring in India. CASE REPORT: Our case involves a 2 year old girl who, from the first weeks onwards, presented bouts of paleness, hypotonia and loss of consciousness when her head came into contact with hot water. The findings from clinical, neurophysiological and neuroimaging studies are described and there was a good response to treatment with valproate. DISCUSSION: The induction of epileptic seizures by immersion in hot water has only rarely been reported in western countries. Its physiopathology remains unknown but genetic factors that determine an alteration in cranial thermoregulation seem to be involved. With similar clinical and electroencephalographic characteristics in patients, the prognosis is usually favourable because of a good response to pharmacological treatment and the tendency toward spontaneous remission of the seizures.

Anticonvulsants↗