An up-to-date review on neuropsychological phenotypes in Dravet syndrome is reported. After recalling the results of various though not numerous studies in the literature, primarily retrospectively, the hypothesis of an original neuropsychological phenotype in Dravet syndrome is presented, consisting of a defect in sensorimotor integration, especially of visuoconstructive abilities. That is particularly evident in the less impaired patients and in the first several years of life. This core phenotype is eventually considered inside the analysis of the etiological multifactorial origin of the cognitive decline, which is especially expressed by the encephalopathy/channelopathy controversy.
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http://dx.doi.org/10.1016/j.eplepsyres.2015.11.020 | DOI Listing |
Zebrafish models of genetic epilepsy benefit from the ability to assess disease-relevant knock-out alleles with numerous tools, including genetically encoded calcium indicators (GECIs) and hypopigmentation alleles to improve visualization. However, there may be unintended effects of these manipulations on the phenotypes under investigation. There is also debate regarding the use of stable loss-of-function (LoF) alleles in zebrafish, due to genetic compensation (GC).
View Article and Find Full Text PDFRinsho Shinkeigaku
January 2025
Department of Pediatrics, Hiroshima City Funairi Citizens Hospital.
The patient was a 21-year-old female. She had frequently had status seizures when she had a fever or while taking a bath since she was 6 months old. At 1 year and 8 months old, she developed epilepsy.
View Article and Find Full Text PDFPediatr Neurol
January 2025
Faculty of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain; Pediatrics Research Group, Institut de Recerca Sant Pau (IR-Sant Pau), Barcelona, Spain; Pediatric Neurology Unit, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.
Background: Dravet syndrome (DS) is a severe developmental and epileptic encephalopathy associated with loss-of-function variants in the SCN1A gene. Although predominantly expressed in the central nervous system, SCN1A is also expressed in the heart, suggesting a potential link between neuronal and cardiac channelopathies. Additionally, DS carries a high risk of sudden unexpected death in epilepsy (SUDEP).
View Article and Find Full Text PDFEpilepsy Behav
January 2025
Department of Neurosurgery, Mass General Brigham, Harvard Medical School, Boston, MA 02115, USA.
Lennox-Gastaut syndrome (LGS) is a severe, childhood-onset developmental and epileptic encephalopathy characterized by multiple drug-resistant seizure types, specific electroencephalogram (EEG) patterns, and significant cognitive and behavioral impairments. To date, eight anti-seizure medications (ASMs) have been specifically approved by the U.S.
View Article and Find Full Text PDFJ Clin Invest
January 2025
Department of Pharmacology, University of Michigan Medical School, Ann Arbor, United States of America.
Dravet syndrome (DS) is a developmental and epileptic encephalopathy (DEE) that begins in the first year of life. While most cases of DS are caused by variants in SCN1A, variants in SCN1B, encoding voltage-gated sodium channel β1 subunits, are also linked to DS or to the more severe early infantile DEE. Both disorders fall under the OMIM term DEE52.
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