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A set of clinical features may be stereotyped enough to warrant classification as a syndrome even though cases are not common. One pattern of seizures in very young infants is known as benign neonatal convulsions or benign neonatal idiopathic seizures. These seizures occur in otherwise healthy, full-term infants. Criteria used to make the diagnosis include: , Typically the seizures begin on the fifth day of life.
Some authors have used the term "fifth-day fits. In a review of six different series of patients with benign idiopathic neonatal seizures, Plouin 27 noted that in all patients described, the onset of seizures occurred between the first and seventh day of life. The first seizure occurred on day 5 in half of the cases for which the exact day was reported. The seizures are usually partial clonic and may be confined to one body part or migrate from one region to another.
Apnea may occur with the clonic activity or be the sole manifestation of the seizure. Tonic seizures are rare. The seizures often occur in a crescendo of activity. Initially the infant is normal between seizures. The seizures then increase in frequency until the child goes into status epilepticus. The flurry of seizures usually lasts less than 24 hours but may continue for a few days. EEG findings in benign idiopathic neonatal seizures vary. The theta pointu alternant pattern consists of dominant theta activity that is discontinuous, unreactive, often asynchronous, and has intermixed sharp waves.
It is present throughout sleep and the awake state and may persist up to the 12th day of life, even after the seizures have ceased.
The theta pointu alternant pattern is not specific for benign seizures and can be seen after a variety of neonatal encephalopathies. However, Plouin 27 claims that this EEG pattern is associated with a favorable prognosis regardless of etiology. Adapted from: Holmes GL. Classification of seizures and the epilepsies. The comprehensive evaluation and treatment of epilepsy. With permission from Elsevier www. The mission of the Epilepsy Foundation is to lead the fight to overcome the challenges of living with epilepsy and to accelerate therapies to stop seizures, find cures, and save lives.
Skip to main content. Sign In Register find us donate. Benign Neonatal Convulsions. In a survey of EEGs from infants with the disorder, 27 the interictal EEG: was normal in 10 infants was excessively discontinuous in 6 showed "focal or multifocal" abnormalities in 25 showed the theta pointu alternant pattern in 60 The theta pointu alternant pattern consists of dominant theta activity that is discontinuous, unreactive, often asynchronous, and has intermixed sharp waves.
Authored By:. Authored Date:. Our Mission The mission of the Epilepsy Foundation is to lead the fight to overcome the challenges of living with epilepsy and to accelerate therapies to stop seizures, find cures, and save lives. Search form.
Convulsions néonatales et mouvements anormaux
Only comments seeking to improve the quality and accuracy of information on the Orphanet website are accepted. For all other comments, please send your remarks via contact us. Only comments written in English can be processed. Benign familial neonatal epilepsy BFNE is a rare genetic epilepsy syndrome characterized by the occurrence of afebrile seizures in otherwise healthy newborns with onset in the first few days of life. Prevalence is currently unknown since this disorder is possibly overlooked. About families have been reported to date.
Benign Neonatal Convulsions
Marret, A. Chadie, S. Rondeau, A. Journal page Archives Contents list.
The most prominent feature, specific and frequent of neurologic dysfunction in the neonatal period is the occurrence of seizures. Causes of neonatal seizures encompass virtually the entire spectrum of neurologic disorders, but most neonatal seizures are due to perinatal asphyxia. Neonatal seizure prognosis is cause dependent. Main factor determining outcome is the underlying cause and it severity. Including a total of 96 neonates with convulsions. The aim of this study is to analyze the epidemiological, clinical and evolutional characteristics of neonatal seizures, in order to facilitate the diagnosis in daily clinical practice, and to avoid sequel during brain development.