The effect of selective attention on the gamma-band auditory steady-state response

Patrick D. Skosnik, Giri P. Krishnan, Brian O'Donnell

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Studies have demonstrated that selective attention can modulate the steady-state evoked potential to repetitive visual and tactile stimulation. However, examinations of the effect of attention on the auditory steady-state response (ASSR) have proven equivocal. The current experiment therefore utilized EEG to examine the effect of attention on the ASSR in healthy humans (n = 15). Auditory click trains in the beta (20 Hz) and gamma (40 Hz) ranges were randomly presented binaurally in an oddball discrimination paradigm (each frequency served as the oddball (target) in each of two blocks). A Fast Fourier Transform was used to assess the effect of attention on the ASSR (signal power), and phase consistency across trials was assessed using the phase-locking factor (PLF). As expected, both 20 and 40 Hz targets elicited a robust P300 response, with maximal amplitudes over parietal regions. For the ASSR, it was found that EEG signal power was larger to 40 Hz targets compared to 40 Hz frequent stimuli across all frontocentral electrodes. No differences in signal power were observed during 20 Hz stimulation. Finally, increased PLF values were observed for 40 Hz targets compared to frequent trials. These results provide evidence that selective attention can enhance signal power and phase-locking of the ASSR, particularly to auditory stimulation in the gamma range.

Original languageEnglish
Pages (from-to)223-228
Number of pages6
JournalNeuroscience Letters
Volume420
Issue number3
DOIs
StatePublished - Jun 15 2007

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Electroencephalography
Acoustic Stimulation
Photic Stimulation
Parietal Lobe
Touch
Fourier Analysis
Evoked Potentials
Electrodes

Keywords

  • Attention
  • Auditory
  • Electroencephalogram (EEG)
  • Event-related potential (ERP)
  • Perception
  • Steady-state

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

The effect of selective attention on the gamma-band auditory steady-state response. / Skosnik, Patrick D.; Krishnan, Giri P.; O'Donnell, Brian.

In: Neuroscience Letters, Vol. 420, No. 3, 15.06.2007, p. 223-228.

Research output: Contribution to journalArticle

Skosnik, Patrick D. ; Krishnan, Giri P. ; O'Donnell, Brian. / The effect of selective attention on the gamma-band auditory steady-state response. In: Neuroscience Letters. 2007 ; Vol. 420, No. 3. pp. 223-228.
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