The Study On Event-related Potentials Of Facial Emotional Recognition And Its Clinical Application In Stroke

Face is an important social stimulus in human interactions. From face-stimuli we are not only able to derive information concerning the person's likely age, sex, condition of health and so on, but also able to interpret the meaning of their facial-expressions. The study of the neural mechanism of facial processing has become an important aspect in the cognitive neuroscience. The neuropsychological studies found that prosopagnosic patients failed to recognize the face of close relatives but they could read emotional clues from faces which clearly established a dissociation between face identity and emotional processing. The Bruce-Young model of face recognition had served a general framework for the study of face processing which emphasize parallel processing of facial information between facial identity and facial expression. The perception of facial processing was involved in the middle region of the right fusiform gyrus with the functional neuroimaging. Event-related potential (ERP) could provide high distinguished time information, during face recognition processing studies, Bentin et al described a negative potential with a mean peak latency of 170 ms that was elicited by human faces in the temporo-occipital areas, which reflected the structural encoder proposed by Bruce-Young and was not related to face familiarity, sex, age and race. The N170 elicited by inverted human faces was slightly more negative and delayed relative to that elicited by upright faces. Most studies in face recognition focused on the latency and amplitude of the N170, they did not involve in change of the other ERP components...