Early recanalization is a major prognostic factor in vascular accidents ischemic brain injury (AIC). The acute phase therapies of AIC aim to recanalization by intravenous thrombolysis and/or mechanical thrombectomy. Recanalization is identified immediately during thrombectomy by per-procedural arteriography. For the thrombolysis, only a performed MRI will validate the recanalization. This "proof of concept" study aims to identify an Electro-Encephalographic biomarker (EEG) of the recanalization in real time, the EEG being easy to set up. This biomarker will be sought during recanalization certified by thrombectomy in order to identify the window time for which the biomarker must be sought on the EEG. During this study, the identified EEG biomarker can be used to validate the recanalization during the intravenous thrombolysis in future studies

Inclusion Criteria:

• Patient over 18 years old
• Presenting a cerebral infarction with proximal occlusion of the sylvian artery requiring thrombectomy
• No objection to participation in the study

Exclusion Criteria:

• Pregnant or breastfeeding women
• Patient benefiting from legal protection
• Absence of affiliation to a social protection scheme
• Recent cranial surgery not allowing the installation of a scalp EEG

Inclusions 15 patients hospitalized for an ischemic stroke for whom an MRI identified a proximal sylvian artery occlusion, treatable by mechanical thrombectomy.