Memory-driven processing in human medial occipital cortex: An event- related optical signal (EROS) study

Gabriele Gratton, Monica Fabiani, Marsha R. Goodman-Wood, M. Catherine Desoto

Research output: Contribution to journalArticlepeer-review


Memory-driven processing in medial occipital areas (Area V1 and immediately adjacent structures) was investigated noninvasively using the event-related optical signal (EROS). Subjects viewed two letter stimuli presented in the left and right hemifields, respectively. They then viewed a centrally presented test letter and had to indicate whether this letter was the same as either of the letters presented earlier. The initial EROS response to the test stimulus in medial occipital areas (latency: 50-150 ms) was unilaterally suppressed in the hemisphere previously exposed to the same stimulus. This finding suggests that medial occipital cortex activity is modulated by a rapidly adapting hemispheric-specific pattern recognition mechanism.

Original languageEnglish (US)
Pages (from-to)348-351
Number of pages4
Issue number3
StatePublished - 1998
Externally publishedYes


  • Area V1
  • Event-related optical signal (EROS)
  • Hemispheric organization
  • Medial occipital cortex
  • Memory-driven processing
  • Pattern recognition

ASJC Scopus subject areas

  • Neuroscience(all)
  • Neuropsychology and Physiological Psychology
  • Experimental and Cognitive Psychology
  • Neurology
  • Endocrine and Autonomic Systems
  • Developmental Neuroscience
  • Cognitive Neuroscience
  • Biological Psychiatry


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