Journal
NEUROREPORT
Volume 14, Issue 16, Pages 2035-2039Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/00001756-200311140-00006
Keywords
face-sensitive N170; low and high vision; PI; VPP
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The present study used a parametric design to characterize early event-related potentials (ERP) to face stimuli embedded in gradually decreasing random noise levels. For both N170 and the vertex positive potential (VPP) there was a linear increase in amplitude and decrease in latency with decreasing levels of noise. In contrast, the earlier visual PI component was stable across noise levels. The PI/N170 dissociation suggests not only a functional dissociation between low and high-level visual processing of faces but also that the N170 reflects the integration of sensorial information into a unitary representation. In addition, the N170/VPP association supports the view that they reflect the same processes operating when viewing faces.
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