True about chronic subdural hematoma is
(A) May present as fainting attacks and remit # Subdural Haemorrhage# 6 times commoner than extradural haemorrhage. It is caused by --> Laceration of the cortex associated with venous or arterial haemorrhage, the haematoma of which collects under the dura mater.> This type of haemorrhage is less significant and less dangerous.> Significant subdural haemorrhage is caused by rupture of superior cerebral veins.> These veins run upwards along the surface of the cerebral hemospheres and then pierce the arachnoid mater and enter into the subdural space before it reaches the superior sagittal sinus.> So these veins are fixed on one side to the arachnoid mater and surface of the brain and on the other side to the dura mater lining the sagittal sinus.> Between these two fixed points, these veins lie free and remain mobile in the subdural space.> Impact to the front or back of the head may lead to rupture of these veins causing subdurai haemorrhage.> The cerebral hemisphere moves along with the lower parts of the superior cerebral veins, whereas the upper parts of these veins are fixed to the superior sagittal sinus into which they drain.> This causes alarming haemorrhage in the subdural space.> Subdural haemorrhage is much commoner in the elderly as the brain atrophies in these individuals giving rise to more space for the brain to move within the skull.> In these individuals subdural haemorrhage may occur following a trival injury or shaking of head.
May present as fainting attacks and remit
Preceded by history of unconsciousness
May increase in size over time
Reaction time to response
Miscellaneous