Intractable Epilepsy Clinical Trial
Official title:
EXPRESON-INTRA : Intracerebral Recordings of P3a Responses to Own-names Uttered by Expressive and Neutral Voices in Pharmacoresistant Epilepsy Adult Patients
Neurophysiologic evaluation of disorders of consciousness (DOC) patients in intensive care unit include late auditory evoked potentials. It allows the physicians to record cerebral responses of patients to auditory stimuli and in particularly to their own name (as the P3a response). Numerous studies try to improve the relevance of the auditory stimuli used in this paradigm and notably using more expressive stimuli. Here the investigators investigate the intracerebral correlates of the P3a responses recorded on the scalp with neutral and more expressive stimuli.
Late auditory evoked potentials (as P3 wave) are used in neurophysiology to assess the level of consciousness in DOC (disorder of consciousness) patients. The P3 wave, elicited by listening standard and deviant stimuli, corresponds to the activation of a frontoparietal network and is considered to reflect a cognitive attention task. Using the own name of the patient as deviant stimuli improve the ability to detect the P3 wave because of the particularly relevance of this stimulus for the patient. In human cognition, to identify the expressivity valence of a voice is essential. Neural processing of expressive voices should involves more widespread brain areas than neutral voices processing. Here the investigators investigate the intracerebral correlates of the P3a responses recorded on the scalp to own-name stimuli uttered by neutral and more expressive voices (positive : smiling voice or negative : rough voice) in adult pharmacoresistant epilepsy patients. ;
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