Septal lesions potentiate freezing behavior to contextual but not to phasic conditioned stimuli in rats

P. D. Sparks, Joseph Ledoux

Research output: Contribution to journalArticle

Abstract

The effects on freezing behavior elicited by contextual and phasic conditioned stimuli (CSs) were examined in rats with septal lesions. Two weeks after surgery, blocks of 2 conditioning trials consisting of a tone (10 kHz, 75 dB, 20s) paired with a footshock (500 ms, 0.5 mA) were presented on 2 consecutive days. Tone-alone trials were presented each day thereafter until extinction criterion was met. Septal lesions were found to potentiate the freezing response elicited by contextual stimuli but had no effect on freezing elicited by the phasic CS. The septum thus appears to be involved in the acquisition and/or expression of defensive behaviors elicited by contextual stimuli.

Original languageEnglish (US)
Pages (from-to)184-188
Number of pages5
JournalBehavioral Neuroscience
Volume109
Issue number1
DOIs
StatePublished - 1995

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Freezing
Psychological Extinction
Conditioning (Psychology)

ASJC Scopus subject areas

  • Behavioral Neuroscience
  • Clinical Psychology

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Septal lesions potentiate freezing behavior to contextual but not to phasic conditioned stimuli in rats. / Sparks, P. D.; Ledoux, Joseph.

In: Behavioral Neuroscience, Vol. 109, No. 1, 1995, p. 184-188.

Research output: Contribution to journalArticle

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