Contextual modulation of orientation discrimination is independent of stimulus processing time

Zoltán Vidnyánszky, Thomas V. Papathomas, Bela Julesz

Research output: Contribution to journalArticle

9 Citations (Scopus)


Contextual inhibition of neural activity in the primary visual cortex begins immediately and is most pronounced in the early transient response component. Using backward masking to control available processing time, we investigated whether the interaction between perceptual contextual modulation and processing time reflects the neural dynamics of contextual inhibition. We found that the threshold elevation due to contextual inhibition in an orientation-discrimination task is essentially independent of the available processing time and that it is closely related to contextual inhibition of the early transient response component of orientation-selective neurons in the primary visual cortex.

Original languageEnglish
Pages (from-to)2813-2817
Number of pages5
JournalVision Research
Issue number22
Publication statusPublished - Nov 20 2001



  • Contextual modulation
  • Masking
  • Orientation discrimination

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

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