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Related Experiment Videos

Experimental seizures in the frog (Rana pipiens)

K S Blisard1, K Fagin, P Falivena

  • 1Department of Pathology, University of Cincinnati College of Medicine, OH 45267-0529.

Epilepsy Research
|January 1, 1994
PubMed
Summary
This summary is machine-generated.

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Leopard frogs exhibit seizure responses to various chemical convulsants, including kainic acid, pentylenetetrazole, bicuculline, and strychnine. These frog seizure models offer insights comparable to mammalian models for neurological research.

Area of Science:

  • Neuroscience
  • Comparative Physiology
  • Pharmacology

Background:

  • The leopard frog (Rana pipiens) serves as a model organism for neurological studies.
  • Understanding seizure mechanisms in non-mammalian vertebrates can provide comparative insights into brain function.

Purpose of the Study:

  • To investigate the effects of systemic administration of chemical convulsants on the leopard frog.
  • To characterize the electroencephalographic (EEG) patterns associated with induced seizures in frogs.
  • To compare frog seizure responses to those observed in mammalian models.

Main Methods:

  • Systemic administration of kainic acid, pentylenetetrazole, bicuculline, strychnine, and cis-diamminedichloroplatinum II to leopard frogs.
  • Intracerebral electroencephalographic (EEG) recordings to monitor brain activity.

Related Experiment Videos

  • Behavioral observation of seizure manifestations.

    • Main Results:

    • Kainic acid induced lethal limbic-like seizures with specific EEG patterns originating in the olfactory/telencephalic (OLF-M) region.
    • Pentylenetetrazole and bicuculline caused motor seizures with distinct rhythmic spike-and-wave discharges maximal at OLF-M.
    • Strychnine produced reversible tonic seizures suggestive of spinal cord origin.
    • Cis-diamminedichloroplatinum II resulted in recurrent seizures with characteristic EEG changes.

    Conclusions:

    • Leopard frogs display varied seizure types in response to chemical convulsants.
    • EEG patterns in frogs share similarities with mammalian seizure activity, particularly originating from the OLF-M region.
    • The frog's neurochemical excitability to convulsants provides a valuable comparative model for mammalian epilepsy research.