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  • From molecules to networks: cortical/subcortical interactions in the pathophysiology of idiopathic generalized epilepsy
  • Blumenfeld H
  • Epilepsia 2003[]; 44 Suppl 2 (): 7-15
  • Generalized epilepsy involves abnormally synchronized activity in large-scale neuronal networks. Burst firing of action potentials is a potent mechanism for increasing neural synchrony and is thought to enhance cortical and thalamic rhythmic network activity. Absence seizures, a form of generalized epilepsy, occur in children as brief 5- to 10-s periods of behavioral arrest associated with massive 3- to 4-Hz spike-wave discharges in cortical and thalamic networks. Prior research has shown that enhanced burst firing may be crucial for the transition from normal to epileptic activity. Can enhanced burst firing in one region of the nervous system, such as the cortex, transform the entire thalamocortical network from normal activity to spike-and-wave seizures? Enhanced burst firing in corticothalamic neurons may increase gamma-aminobutyric acid-B (GABAB) receptor activation in the thalamus, leading to the slower, more synchronous oscillations seen in spike-and-wave seizures. Does "generalized" spike-wave activity homogeneously involve the entire brain, or are there crucial nodes that are more important than others for the generation and behavioral manifestations of generalized seizures? Animal and human data suggest that so-called generalized seizures involve selective thalamocortical networks while sparing others. A greater understanding of these molecular and network mechanisms will ultimately lead to improved targeted therapies for generalized epilepsy.
  • |Animals[MESH]
  • |Brain Mapping[MESH]
  • |Cerebral Cortex/drug effects/*physiopathology[MESH]
  • |Electric Stimulation[MESH]
  • |Electroencephalography/drug effects/statistics & numerical data[MESH]
  • |Electrophysiology/statistics & numerical data[MESH]
  • |Epilepsy, Generalized/*physiopathology[MESH]
  • |Ferrets[MESH]
  • |GABA Antagonists/pharmacology[MESH]
  • |Humans[MESH]
  • |Magnetic Resonance Imaging[MESH]
  • |Models, Neurological[MESH]
  • |Neural Pathways/drug effects/physiopathology[MESH]
  • |Picrotoxin/pharmacology[MESH]
  • |Sodium Channels/physiology[MESH]
  • |Syndrome[MESH]
  • |Thalamus/drug effects/*physiopathology[MESH]

  • *{{pmid12752456}}
    *<b>[ From molecules to networks: cortical/subcortical interactions in the pathophysiology of idiopathic generalized epilepsy ]</b> Epilepsia 2003; 44 Suppl 2() ; 7-15 Blumenfeld H


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    7 .44 Suppl 2 2003