subdural hematoma ( sdh ) is a result of torn bridging meningeal veins.
which type of hematoma is a result of torn bridging meningeal veins?
subdural hematoma ( sdh )
subdural hematoma





























a subdural hematoma (sdh) is a type of hematoma—usually associated with traumatic brain injury—in which blood gathers between the inner layer of the dura mater and the arachnoid mater. it usually results from tears in bridging veins that cross the subdural space. 





























subdural hematomas may cause an increase in intracranial pressure (icp), which in turn can cause compression of and damage to delicate brain tissue. acute subdural hematomas are often life-threatening. chronic subdural hematomas have a better prognosis if properly managed.
subdural hematoma
arachnoid villi, which are outgrowths of the arachnoid mater (the middle meningeal layer), extend into the dural venous sinuses to drain csf. these villi act as one-way valves.





























meningeal veins, which course through the dura mater, and bridging veins, which drain the underlying neural tissue and puncture the dura mater, empty into these dural sinuses. a rupture of a bridging vein causes a subdural hematoma.





























section::::structure.:nerve supply.





























the supratentorial dura mater membrane is supplied by small meningeal branches of the trigeminal nerve (v1, v2 and v3). the innervation for the infratentorial dura mater are via upper cervical nerves.





























section::::clinical significance.
dura mater