Discrimination and conditioning of photic evoked cortical macropotentials in the albino rat

Joel P Rosenfeld*, Bruce E. Hetzler

*Corresponding author for this work

Research output: Contribution to journalArticle

5 Scopus citations


Nine rats were rewarded with lateral hypothalamic brain stimulation for pressing a given bar following enhanced photic evoked components or for pressing another bar following depressed components. Evoking stimulus intensity was constant so that the responses to be discriminated varied due to presumably internal state fluctuations. Most rats learned only to generate one kind of wave and remain on the appropriate bar. Two rats that learned this operant learned additionally to signal trials in which they failed to generate the predominant response. One rat displayed discrimination in the absence of operant production of particular wave types. Specific electrophysiological correlates of these response styles were found and taken as evidence that operant neural conditioning may involve atypical states of the organism. Also discussed in terms of electrophysiological data were (1) the nature of the difficulty of neural discrimination, and (2) antecedents for the various observed response styles.

Original languageEnglish (US)
Pages (from-to)753-765
Number of pages13
JournalPhysiology and Behavior
Issue number6
StatePublished - Jan 1 1973


  • Conditioning
  • Evoked potentials
  • Photic evoked components

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Behavioral Neuroscience

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