August 2010
Volume 10, Issue 7
Free
Vision Sciences Society Annual Meeting Abstract  |   August 2010
Adaptation to Up/Down Head Rotation in Face Selective Cortical Areas
Author Affiliations
  • Ming Mei
    Centre for Vision Research, York University
  • Lisa Betts
    Department of Psychology, McMaster University
  • Frances Wilkinson
    Centre for Vision Research, York University
  • Hugh Wilson
    Centre for Vision Research, York University
Journal of Vision August 2010, Vol.10, 614. doi:10.1167/10.7.614
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      Ming Mei, Lisa Betts, Frances Wilkinson, Hugh Wilson; Adaptation to Up/Down Head Rotation in Face Selective Cortical Areas. Journal of Vision 2010;10(7):614. doi: 10.1167/10.7.614.

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Abstract

Although faces are naturally seen in both left/right and up/down rotated views, virtually all fMRI work on the representation of face views has examined only left/right rotation around frontal views. Accordingly, we designed an fMRI adaptation study to test multiple cortical areas for up/down viewpoint selectivity. Face-selective regions of interest were determined in a block-designed scan comparing responses to faces versus houses. This identified five face-selective regions of interest: fusiform face area (FFA), occipital face area (OFA), lateral occipital complex (LOC), superior temporal sulcus (STS), and inferior frontal sulcus (IFS). Event-related scans with a cross-adaptation paradigm were used to examine BOLD signals in each face region. Subjects adapted to frontal, up 20°, or down 20° views followed by one of these as a test view, thus producing nine different adapt/test combinations. Twelve subjects with normal vision were scanned. An initial two way ANOVA examined effects of hemisphere and self-adaptation (i.e. identical test and adapt stimuli). This analysis showed an effect of hemisphere (right magnitudes larger) only in FFA, and significant adaptation effects in FFA (p <0.001), OFA (p <0.01), and IFS (p <0.028). A second ANOVA compared results for all adapt and test view combinations to their no adapt conditions in these three areas. FFA and IFS showed a significant cross-adaptation as well as self-adaptation. In general, upward faces produced greater adaptation than adaptation to frontal or downward faces in these areas, thus indicating view selective tuning in the up/down direction. Results in OFA, however, suggest an invariance to up/down head rotation. Thus, up/down head rotation is encoded in some but not all face selective cortical areas.

Mei, M. Betts, L. Wilkinson, F. Wilson, H. (2010). Adaptation to Up/Down Head Rotation in Face Selective Cortical Areas [Abstract]. Journal of Vision, 10(7):614, 614a, http://www.journalofvision.org/content/10/7/614, doi:10.1167/10.7.614. [CrossRef]
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