Oscillatory characteristics of face-evoked neuromagnetic responses

Fu Jung Hsiao, Yung Yang Lin*, Jen Chuen Hsieh, Zin An Wu, Low Tone Ho, Yin Chang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


To study the oscillatory activities during face processing, we recorded magnetoencephalographic responses in 8 healthy subjects to upright and inverted human faces, and obtained the time-frequency representation by using wavelet transform. Delta to beta activities were clearly increased at 140-210 ms after stimulus onset in the bilateral occipitotemporal (OT) areas (t7 > 5.5; p < 0.001), with larger power for theta, alpha and beta over the right side. Notably, more increase alpha activity for inverted than upright face condition was observed in the right OT area. Our results suggest that 4-25 Hz oscillations are involved in face information processing, and the more activation over the right OT implies the right hemisphere advantage for face perception. Moreover, the alpha activity may reflect the differential cortical demands for processing inverted and upright face images.

Original languageEnglish
Pages (from-to)113-120
Number of pages8
JournalInternational Journal of Psychophysiology
Issue number2
StatePublished - Aug 2006


  • Alpha rhythm
  • Brain rhythmic activity
  • Face inversion
  • Face processing
  • Human
  • Magnetoencephalography
  • Wavelet transform


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