Relationship between steady-state and induced gamma activity to motion

Giri P. Krishnan, Patrick D. Skosnik, Jenifer L. Vohs, Thomas A. Busey, Brian F. O'Donnell

Research output: Contribution to journalArticle

15 Scopus citations


When a moving stimulus is presented at a specific temporal frequency, both steady-state responses and induced γ activity may be elicited in the electroencephalogram. The electroencephalogram was recorded when study participants viewed random dot kinematograms under three conditions: coherent motion, incoherent motion and stationary. Dot position was changed at a rate of 9.3 Hz in the coherent and incoherent conditions. Induced power at 40Hz was increased during coherent motion compared with the other conditions. In contrast, the steady-state response at 9.3 Hz showed a trend for increased power during the incoherent condition. These results suggest that steady-state responses to moving stimuli reflect sensory activation, while the induced γ activity indexes perceptual processes.

Original languageEnglish (US)
Pages (from-to)625-630
Number of pages6
Issue number6
StatePublished - Apr 25 2005


  • Electroencephalogram
  • Induced γ activity
  • Motion
  • Random dot kinematograms
  • Steady-state activity

ASJC Scopus subject areas

  • Neuroscience(all)

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