Central Nervous System Trauma

A blow to the head can cause a closed injury.

Brain damage can only occur with visible external signs of head injury.

Contusions are typically found in regions of the brain overlying smooth and regular inner skull surfaces.

Traumatic parenchymal injuries can involve both the parenchyma and the vasculature.

Old traumatic lesions are characterized by their bright red color and swollen appearance.

Subarachnoid and intraparenchymal hemorrhages typically occur at sites of contusions and lacerations.

Epidural hematomas are most common in infants due to the deformable skull.

Subdural hematomas are typically caused by the tearing of dural vessels.

Epidural hematomas can expand rapidly and constitute a neurosurgical emergency.

Acute subdural hematoma appears as a collection of freshly clotted blood extending into the depths of sulci.