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Related Experiment Videos

Behaviors induced or disrupted by complex partial seizures.

L S Leung1, J Ma, R S McLachlan

  • 1Department of Physiology and Clinical Neurological Sciences, University of Western Ontario, Ont., N6A 5A5, London, Canada. sleung@julian.uwo.ca

Neuroscience and Biobehavioral Reviews
|September 7, 2000
PubMed
Summary

Temporal lobe seizures alter behaviors through neural changes in the brain. Animal models reveal specific mechanisms for postictal behaviors like hyperactivity and hypoactivity, offering insights into human epilepsy.

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Area of Science:

  • Neuroscience
  • Epilepsy Research
  • Behavioral Neurology

Background:

  • Temporal lobe seizures (TLS) are associated with diverse postictal behaviors in humans and animals.
  • Understanding the neural underpinnings of these behaviors is crucial for developing targeted therapies.
  • Existing research suggests involvement of subcortical structures in mediating seizure-induced behavioral changes.

Purpose of the Study:

  • To review and elucidate the neural mechanisms responsible for postictal behaviors following temporal lobe seizures.
  • To explore the role of specific brain regions, such as the nucleus accumbens and medial septum, in seizure-induced behaviors.
  • To discuss the translational relevance of animal models for understanding human postictal phenomena.

Main Methods:

  • Review of existing literature on neural mechanisms of postictal behaviors.

Related Experiment Videos

  • Analysis of studies involving animal models of temporal lobe seizures (e.g., hippocampal afterdischarge in rats).
  • Investigation of pharmacological interventions (e.g., dopamine D(2) receptor antagonist) and neurophysiological manipulations (e.g., medial septum inactivation).

    • Main Results:

    • Non-convulsive hippocampal seizures induced hyperactivity, suppressed by dopamine D(2) antagonism in the nucleus accumbens and medial septum inactivation.
    • Convulsive seizures led to hypoactivity, potentially due to frontal cortex spread and opiate-mediated depression.
    • Mechanisms for postictal psychosis and memory disruption were also considered.

    Conclusions:

    • Postictal behaviors observed in humans after temporal lobe seizures have parallels in animal models.
    • Neural processing changes in the temporal lobe and connected subcortical structures are key to understanding these behavioral alterations.
    • Animal models provide valuable insights into the neural basis of complex postictal behaviors.