Facial emotion detection in Vestibular Schwannoma patients with and without facial paresis.
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by
Stephanie Blom, Henk Aarts, H.P.M. Kunst, Capi C. Wever, Gün R. Semin
Abstract
This study investigates whether there exist differences in facial emotion detection accuracy in patients suffering from Vestibular Schwannoma (VS) due do their facial paresis. Forty-four VS patients, half of them with and half of them without a facial paresis, had to classify pictures of facial expressions as being emotional or non-emotional. The visual information of images was systematically manipulated by adding different levels of visual noise. The study had a mixed design with emotional expression (happy vs. angry) and visual noise level (10 to 80%) as repeated measures, and facial paresis (present vs. absent) and degree of facial dysfunction as between subjects' factors. Emotion detection accuracy declined when visual information declined, an effect that was stronger for angry than for happy expressions. Overall, emotion detection accuracy for happy and angry faces did not differ between VS patients with or without a facial paresis, although exploratory analyses suggest that the ability to recognize emotions in angry facial expressions was slightly more impaired in patients with facial paresis. The findings are discussed in the context of the effects of facial paresis on emotion detection, and the role of facial mimicry in particular as an important mechanism of facial emotion processing and understanding.
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