Induced gamma activity is associated with conscious awareness of pattern masked nouns

Christopher Summerfield, Anthony I. Jack, Adrian P. Burgess

Research output: Contribution to journalArticlepeer-review


The aim of this study was to explore the relationship between electroencephalographic (EEG) activity in the gamma frequency range and conscious awareness of a visual stimulus. EEG was recorded from subjects while they were shown backward-masked words only some of which they were able to discriminate correctly. The results showed that activity in the gamma frequency range increase with reported awareness of a word independently of whether it was correctly discriminated or not. It is concluded that gamma power is associated with awareness-dependent visual processing but not with processing that occurs in the absence of awareness.
Original languageEnglish
Pages (from-to)93-100
Number of pages8
JournalInternational Journal of Psychophysiology
Issue number2
Publication statusPublished - May 2002


  • electroencephalography
  • gamma oscillations
  • pattern masking
  • awareness
  • consciousness
  • subjective reports

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