The M170 Reflects a Viewpoint-Dependent Representation for Both Familiar and Unfamiliar Faces.

@article{citeulike:1309920, abstract = {The aim of this study was to determine the extent to which the neural representation of faces in visual cortex is viewpoint dependent or viewpoint invariant. Magnetoencephalography was used to measure evoked responses to faces during an adaptation paradigm. Using familiar and unfamiliar faces, we compared the amplitude of the M170 response to repeated images of the same face with images of different faces. We found a reduction in the M170 amplitude to repeated presentations of the same face image compared with images of different faces when shown from the same viewpoint. To establish if this adaptation to the identity of a face was invariant to changes in viewpoint, we varied the viewing angle of the face within a block. We found a reduction in response was no longer evident when images of the same face were shown from different viewpoints. This viewpoint-dependent pattern of results was the same for both familiar and unfamiliar faces. These results imply that either the face-selective M170 response reflects an early stage of face processing or that the computations underlying face recognition depend on a viewpoint-dependent neuronal representation.}, address = {Department of Psychology, University of York, UK.}, author = {Ewbank, Michael P P. and Smith, William A P A. and Hancock, Edwin R R. and Andrews, Timothy J J. }, citeulike-article-id = {1309920}, doi = {http://dx.doi.org/10.1093/cercor/bhm060}, issn = {1047-3211}, journal = {Cereb Cortex}, keywords = {face, invariance, n170, recognition, viewpoint}, month = {May}, posted-at = {2007-08-06 13:03:50}, priority = {0}, title = {The M170 Reflects a Viewpoint-Dependent Representation for Both Familiar and Unfamiliar Faces.}, url = {http://dx.doi.org/10.1093/cercor/bhm060}, year = {2007} }

TY - JOUR ID - citeulike:1309920 L3 - citeulike-article-id:1309920 TI - The M170 Reflects a Viewpoint-Dependent Representation for Both Familiar and Unfamiliar Faces. JF - Cereb Cortex AD - Department of Psychology, University of York, UK. SN - 1047-3211 N2 - The aim of this study was to determine the extent to which the neural representation of faces in visual cortex is viewpoint dependent or viewpoint invariant. Magnetoencephalography was used to measure evoked responses to faces during an adaptation paradigm. Using familiar and unfamiliar faces, we compared the amplitude of the M170 response to repeated images of the same face with images of different faces. We found a reduction in the M170 amplitude to repeated presentations of the same face image compared with images of different faces when shown from the same viewpoint. To establish if this adaptation to the identity of a face was invariant to changes in viewpoint, we varied the viewing angle of the face within a block. We found a reduction in response was no longer evident when images of the same face were shown from different viewpoints. This viewpoint-dependent pattern of results was the same for both familiar and unfamiliar faces. These results imply that either the face-selective M170 response reflects an early stage of face processing or that the computations underlying face recognition depend on a viewpoint-dependent neuronal representation. KW - face KW - invariance KW - n170 KW - recognition KW - viewpoint AU - Ewbank, Michael P AU - Smith, William A P AU - Hancock, Edwin R AU - Andrews, Timothy J PY - 2007/05/16/ UR - http://dx.doi.org/10.1093/cercor/bhm060 ER -