Document Detail

Magnetoencephalography in the detection of focal lesions in West syndrome.
MedLine Citation:
PMID:  11701249     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: According to the international classification of epilepsy syndromes, West syndrome (WS) is a form of generalized epilepsy. However, it is known that localized lesions can induce WS and that patients with WS often subsequently develop focal seizures. We evaluated such patients using magnetoencephalography (MEG). METHOD: Fourteen patients of 3 months to 6 years of age who had or who had previously had WS were examined. MEGs were recorded using a laying-type whole-cortex MEG system with a 160-channel first-order gradiometer. Twelve-channel electroencephalography (EEG) and one-channel electrocardiography (ECG) were simultaneously recorded. Equivalent current dipoles were estimated at the point of spikes on the EEG. RESULTS: Patients were classified by magnetic resonance imaging (MRI) findings into a focal lesion group (group F, n=7) and a non-focal lesion group (group N, n=7). The dipoles estimated from the MEG were classified into three groups: W, with the dipoles distributed over a wide brain area (n=7); WC, dipoles distributed over a wide area along with a dense dipole distribution in a specific cortical area (n=3); and C, closed dipole distribution in a unilateral cerebral focal area (n=4). Patients were also classified by the stage of the disease during which the MEG was recorded, and by the type of seizure they experienced. Those with hypsarrhythmia examined early in the disease all had pattern W regardless of their lesion group, whereas those examined later exhibited more diverse dipole patterns that corresponded to seizure type. CONCLUSIONS: Dipoles were distributed widely over bilateral cerebral cortex when patients had infantile spasms with hypsarrhythmia whether or not they had focal lesions. The dipole distribution pattern in MEG changed according to changes in seizure type.
H Hattori; T Yamano; T Tsutada; N Tsuyuguchi; H Kawawaki; M Shimogawara
Related Documents :
22198859 - Thrombosis and occlusion of vascular access in hemodialyzed patients.
19833059 - New hope for rasmussen encephalitis?
2618589 - Photosensitivity in epilepsy. electrophysiological and clinical correlates.
10159729 - Does the level of prehospital care influence the outcome of patients with altered level...
20594899 - Heart rate based automatic seizure detection in the newborn.
2924749 - Lack of sister chromatid exchange induction in phenytoin-treated patients with epilepsy.
7741239 - New concepts of iron and aluminium chelation therapy with oral l1 (deferiprone) and oth...
22950529 - Vital capacity and inspiratory capacity as additional parameters to evaluate bronchodil...
3467689 - Reiter's syndrome: chronicity of symptoms and employment.
Publication Detail:
Type:  Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Brain & development     Volume:  23     ISSN:  0387-7604     ISO Abbreviation:  Brain Dev.     Publication Date:  2001 Nov 
Date Detail:
Created Date:  2001-11-09     Completed Date:  2002-02-20     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7909235     Medline TA:  Brain Dev     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  528-32     Citation Subset:  IM    
Department of Pediatrics, Osaka City University Medical School, 1-4-3 Asahi-machi, Abeno-ku, Osaka 545-8585, Japan.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Child, Preschool
Epilepsies, Partial / diagnosis
Epilepsy, Generalized / diagnosis
Predictive Value of Tests
Spasms, Infantile / diagnosis*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Polysomnographical assessment of the pathophysiology of West syndrome.
Next Document:  How do the many etiologies of West syndrome lead to excitability and seizures? The corticotropin rel...