Abstract:
:Previous imaging studies using 11C-flumazenil in patients with mesial temporal lobe epilepsy and neocortical partial seizure disorders have found focal decreases in gamma-aminobutyric acid type A/benzodiazepine receptor binding. These studies used subjective visual assessment and a region of interest approach to quantitation. We performed three-dimensional, 11C-flumazenil positron emission tomography in 12 patients with cortical dysgenesis identified by high-resolution volumetric magnetic resonance imaging and in 26 normal subjects. Spectral analysis was used to produce a parametric image of 11C-flumazenil volume of distribution for each subject. Using volumetric normalization and statistical parametric mapping, we compared the entire brain volume of each patient with the brains of the normal group to produce maps of regions of abnormal 11C-flumazenil binding which were then rendered into the volumetric magnetic resonance images. This allowed a correlation of structure and function to be made. Of the 12 patients, 10 showed at least one region of abnormal 11C-flumazenil binding; the abnormal regions were frequently more extensive than were the lesions seen with magnetic resonance imaging. 11C-Flumazenil binding abnormalities were frequently seen in regions of cortex that had a normal magnetic resonance appearance. Lesions were characterized by increases in gamma-aminobutyric acid type A/benzodiazepine receptor availability, and by the decreases found in previous studies. These findings have implications for the neurobiology of seizure disorders associated with cortical dysgenesis and for the management of such patients if surgery is contemplated.
journal_name
Ann Neuroljournal_title
Annals of neurologyauthors
Richardson MP,Koepp MJ,Brooks DJ,Fish DR,Duncan JSdoi
10.1002/ana.410400210subject
Has Abstractpub_date
1996-08-01 00:00:00pages
188-98issue
2eissn
0364-5134issn
1531-8249journal_volume
40pub_type
杂志文章abstract::Cognitive and extrapyramidal effects of cholinomimetic therapy were evaluated in 8 patients with progressive supranuclear palsy. Each was randomized to a 10-day double-blind crossover trial of physostigmine and placebo. Physostigmine treatment was associated with marginal and inconsistent changes in long-term memory, ...
journal_title:Annals of neurology
pub_type: 临床试验,杂志文章,随机对照试验
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abstract::Angelman syndrome (AS) results from lack of genetic contribution from maternal chromosome 15q11-13. This region encompasses three GABAA receptor subunit genes (beta3, alpha5, and gamma3). The characteristic phenotype of AS is severe mental retardation, ataxic gait, tremulousness, and jerky movements. We studied the mo...
journal_title:Annals of neurology
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pub_type: 杂志文章
doi:10.1002/ana.410140415
更新日期:1983-10-01 00:00:00
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doi:10.1002/ana.410300503
更新日期:1991-11-01 00:00:00
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pub_type: 杂志文章
doi:10.1002/ana.410050310
更新日期:1979-03-01 00:00:00
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journal_title:Annals of neurology
pub_type: 杂志文章
doi:
更新日期:2000-04-01 00:00:00
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journal_title:Annals of neurology
pub_type: 杂志文章
doi:10.1002/ana.410070208
更新日期:1980-02-01 00:00:00
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pub_type: 杂志文章
doi:10.1002/ana.10283
更新日期:2002-09-01 00:00:00
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journal_title:Annals of neurology
pub_type: 杂志文章
doi:10.1002/ana.410250217
更新日期:1989-02-01 00:00:00
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pub_type: 杂志文章
doi:10.1002/ana.410170415
更新日期:1985-04-01 00:00:00
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journal_title:Annals of neurology
pub_type: 杂志文章
doi:10.1002/ana.410030416
更新日期:1978-04-01 00:00:00
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journal_title:Annals of neurology
pub_type: 杂志文章
doi:10.1002/ana.410080606
更新日期:1980-12-01 00:00:00
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journal_title:Annals of neurology
pub_type: 杂志文章
doi:10.1002/ana.410200614
更新日期:1986-12-01 00:00:00
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pub_type: 杂志文章,随机对照试验
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journal_title:Annals of neurology
pub_type: 杂志文章
doi:10.1002/ana.410060612
更新日期:1979-12-01 00:00:00
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更新日期:2003-05-01 00:00:00
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journal_title:Annals of neurology
pub_type: 杂志文章
doi:10.1002/ana.410230314
更新日期:1988-03-01 00:00:00
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pub_type: 临床试验,杂志文章
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更新日期:1998-07-01 00:00:00
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更新日期:1992-03-01 00:00:00
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doi:10.1002/ana.410350107
更新日期:1994-01-01 00:00:00
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更新日期:2017-02-01 00:00:00
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journal_title:Annals of neurology
pub_type: 杂志文章
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更新日期:1978-04-01 00:00:00