Anticoagulants/therapeutic use; Brain Injuries/pathology; Brain Injuries/therapy; Brain/pathology; Brain/physiopathology; Cerebral Angiography; Cerebrovascular Circulation; Circle of Willis; Stroke/etiology; Wounds, Nonpenetrating; Advisory Committees/history; Advisory Committees/organization & administration; Angiography, Digital Subtraction; Brain/anatomy & histology; Brain Injuries/complications; Brain Injuries/history; Brain Injuries/physiopathology; Carotid Artery Injuries/pathology; Carotid Artery Injuries/therapy; Cerebral Arteries/abnormalities; Cerebral Arteries/injuries; Cerebral Arteries/pathology; Cerebrovascular Trauma/pathology; Cerebrovascular Trauma/therapy; Europe; History, 17th Century; History, 18th Century; History, 19th Century; History, 20th Century; Humans; Incidence; Massachusetts; Medical Illustration/history; Societies, Medical/history; Stroke/diagnosis; Stroke/epidemiology; Stroke/pathology; Stroke/physiopathology; Thrombosis/etiology; Thrombosis/prevention & control; Tomography, X-Ray Computed; United States/epidemiology; Wounds, Nonpenetrating/complications; Wounds, Nonpenetrating/pathology; Wounds, Nonpenetrating/physiopathology; Wounds, Nonpenetrating/therapy