<prompt> Which of the following is commonest source of Extradural haemorrhage:Middle meningeal arterySubdural venous sinusCharcots arteryMiddle cerebral artery  <response>: Ans is a ie Middle meningeal artery Ref. Chandrasoma Taylor, 3e, p 924Extradural 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 bw 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 dt rupture of Charcot-Bouchard aneurysms in the lenticulostriate arteries.Subarachnoid Haemorrhage - MC cause is rupture of Berry aneurysms. 