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Social Cognitive and Affective Neuroscience Advance Access published online on June 11, 2007
Social Cognitive and Affective Neuroscience, doi:10.1093/scan/nsm025
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© The Author (2007). Published by Oxford University Press. For Permissions, please email: journals.permissions@oxfordjournals.org

Social perception in the infant brain: gamma oscillatory activity in response to eye gaze

Tobias Grossmann, Mark H. Johnson, Teresa Farroni and Gergely Csibra

Centre for Brain and Cognitive Development, Birkbeck, University of London, UK

Gamma band oscillatory brain activity was measured to examine the neural basis of 4-month-old infants’ perception of eye gaze direction. Infants were presented with photographic images of upright and inverted female faces directing their gaze towards them or to the side. Direct gaze compared to averted gaze in upright faces elicited increased early evoked gamma activity at occipital channels indicating enhanced neural processing during the earliest steps of face encoding. Direct gaze also elicited a later induced gamma burst over right prefrontal channels, suggesting that eye contact detection might recruit very similar cortical regions as in adults. An induced gamma burst in response to averted gaze was observed over right posterior regions, which might reflect neural processes associated with shifting spatial attention. Inverted faces did not produce such effects, confirming that the gamma band oscillations observed in response to gaze direction are specific to upright faces. These data demonstrate the use of gamma band oscillations in examining the development of social perception and suggest an early specialization of brain regions known to process eye gaze.

Keywords: social perception; eye gaze; development; gamma oscillations; infancy

Correspondence should be addressed to Tobias Grossmann, Centre for Brain and Cognitive Development, Birkbeck, University of London, The Henry Wellcome Building, Torrington Square, London WC1E 7HX, UK. E-mail: t.grossmann{at}bbk.ac.uk

Received March 9, 2007. Accepted March 14, 2007.


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