Behavioral effects of continuous hippocampal stimulation in the developing rat

Samuel Thurber, Antonia Chronopoulos, Carl E. Stafstrom, Gregory L. Holmes

Research output: Contribution to journalArticle

Abstract

There is controversy as to whether prolonged seizures are more detrimental to the immature than the mature brain. To evaluate this question continuous hippocampal stimulation was used to induce prolonged limbic seizures in 20-, 30-, and 60-day-old rats. The long-term effects on learning and activity level were then studied at age 80 days using the Morris water maze, a test of spatial learning and memory, and the open field test, a test of an animal's reaction to a novel environment. Limbic status epilepticus in 60-day-old but not 20- and 30-day-old rats caused long-term impairment of learning in the Morris water maze. No differences were noted between the control and the experimental animals in the open field test. These results suggest that the age of seizure onset is an important determinant of long-term cognitive sequelae.

Original languageEnglish (US)
Pages (from-to)35-40
Number of pages6
JournalDevelopmental Brain Research
Volume68
Issue number1
DOIs
StatePublished - Jul 24 1992

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Keywords

  • Continuous hippocampal stimulation
  • Epilepsy
  • Seizure

ASJC Scopus subject areas

  • Developmental Neuroscience
  • Developmental Biology

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