sentences:  He was a student of Jean Charcot at the Pitié-Salpêtrière Hospital, and with Charcot described a disorder that would later be known as a "Charcot-Bouchard aneurysm".It is described as a small aneurysm on cerebral perforated vessels that could be the cause of intracranial hemorrhages.Bouchard wrote about the aneurysm in his doctorate thesis "Étude sur quelques points de la pathogénie des hémorrhagies cérébrales".