This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Traumatic Brain Injury, Subject name: Surgery
[{'content': "Which of the following is commonest source of Extradural haemorrhage: \nSelect and explain. \nA. Middle meningeal artery, B. Subdural venous sinus, C. Charcot's artery, D. Middle cerebral artery", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans is \'a\' ie Middle meningeal artery (Ref. Chandrasoma Taylor, 3/e, p 924)"Extradural Haemorrhage is an accumulation of blood between the skull and the dura. In 90% of cases, bleeding is from a branch of the middle meningeal artery". ChandrasomaAlso remember *Subdural Haemorrhage, commonest source is - communicating veins b/w the cerebral cortex and superior sagittal sinus.Intracerebral Haemorrhage, commonest source is - lenticulostriate arteries in the region around the basal ganglia* and internal capsule. It is frequently d/t rupture of Charcot-Bouchard aneurysms in the lenticulostriate arteries.Subarachnoid Haemorrhage - MC cause is rupture of Berry aneurysms.', 'role': 'assistant'}]