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      Faces in motion: selectivity of macaque and human face processing areas for dynamic stimuli.

      The Journal of neuroscience : the official journal of the Society for Neuroscience
      Adult, Animals, Brain Mapping, Face, Facial Expression, Female, Functional Neuroimaging, Humans, Macaca, Macaca mulatta, Magnetic Resonance Imaging, Male, Motion, Motion Perception, physiology, Photic Stimulation, Visual Cortex, Visual Perception

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          Abstract

          Face recognition mechanisms need to extract information from static and dynamic faces. It has been hypothesized that the analysis of dynamic face attributes is performed by different face areas than the analysis of static facial attributes. To date, there is no evidence for such a division of labor in macaque monkeys. We used fMRI to determine specializations of macaque face areas for motion. Face areas in the fundus of the superior temporal sulcus responded to general object motion; face areas outside of the superior temporal sulcus fundus responded more to facial motion than general object motion. Thus, the macaque face-processing system exhibits regional specialization for facial motion. Human face areas, processing the same stimuli, exhibited specializations for facial motion as well. Yet the spatial patterns of facial motion selectivity differed across species, suggesting that facial dynamics are analyzed differently in humans and macaques.

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