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The Traumatic Subarachnoidal HemorrhageSummary. In general forensic neurotraumatologic experience blunt head traumas can cause a lethal basal subarachnoid hemorrhage. Twenty-seven published cases of traumatic ruptures with either sufficiently described or histologically proven origin from an otherwise "healthy" basal artery system were collected and four new observations were added. In 16 cases detachments and lacerations of arteries in the region of branchings from the Circulus Willisii were described: overstretching ruptures. In eight cases longitudinal ruptures free from branchings were found: bursting ruptures. In the four new cases these 4-5 mm long ruptures we're situated beside the branching of the posterior inferior cerebellar artery. The predominant number of traumas arose from fights under alcoholic influence, which could be classified as minor traumata. Generally only bruises and abrasions in the face were described, furthermore fractures of scull and jaw in three cases and an injury of the cervical vertebral column once. The histologicalproof of the origin of subarachnoidal hemorrhages can be helpful for an exact answer to legal questions. Zusammenfassung" Als Ursache einer t6dlichen basalen subarachnoidalenBlutung (SAB) kommen nach allgemeiner Erfahrung der forensischen Neurotraumatologie auch stumpfe Kopftraumen in Betracht. Aus dem Schrifttum wurden 27 Fglle gesammelt, bei denen die traumatische Ruptur einer ,,gesunden" Schlagaderstrecke hinreichend genau beschrieben und z.T. histologisch gesichert war. Hinzugeffigt wurden vier neue Beobachtungen. Die Rupturen