Beneath the outer coat of brain or spinal cord.
Between the dura mater and the arachnoid.
Beneath the dura mater and above the arachnoid membrane of the meninges.
Space between the dura mater and arachnoid matter of the brain.
Below the dura mater (the outermost of the meninges); relating to the space between the dura mater and arachnoid.
Relating to the space between the strong outer layer of the meninges, the membranes which cover the brain, and the arachnoid, which is the middle layer of the meninges. A subdural haemorrhage occurs when bleeding takes place into this space. The trapped blood forms a large blood clot or haematoma within the skull and this causes pressure on the underlying brain. Bleeding may occur slowly as the result of disease or suddenly as the result of injury. Headaches, confusion and drowsiness result, sometimes with paralysis. Medical attention is required urgently if a serious haematoma occurs soon after injury.