[An unbiased study of the perception of smile and sadness by analysing the integration of emotions].

This article describes a simple and easy-using clinical tool for investigating the visual perception of emotions. The method was validated with healthy persons. On the one hand, the results confirm and sharpen the data of the literature. On the other hand, they enable a precise quantification of the results. Nevertheless, only the perception of the smile and sadness has been studied. Therefore, the extension and validation of this tool to other fundamental emotions is requested. This will enable a simple and easy clinical investigation of troubles of the visual recognition of emotions. On the one hand, for many neurological pathologies: strokes, neurologic disease. On the other hand for psychiatric pathologies: Korsakoff's syndrome, schizophrenia, Alzheimer's disease, other dementias and as on.