Though it is more likely to cause infection, penetrating trauma is similar to closed<unk><unk>  such as cerebral contusion or intracranial hemorrhage. As in closed<unk><unk> , intracranial pressure is likely to increase due to swelling or bleeding, potentially crushing delicate brain tissue. Most deaths from penetrating trauma are caused by damage to blood vessels, which can lead to intracranial hematomas and ischemia, which can in turn lead to a biochemical cascade called the ischemic cascade. The<unk>  in penetrating brain trauma is mostly focal (that is, it affects a specific area of tissue). Studies with PET scanning and transcranial Doppler imaging have shown that changes in cerebral blood flow, such as hypoperfusion and vasospasm, can follow penetrating<unk><unk> . These changes can last for two weeks. An ischemic cascade similar to the course of cellular and metabolic events that follow other<unk> <unk> es may follow penetrating<unk> <unk> es. Sometimes in penetrating<unk> es, the brain releases thromboplastin, which can lead to problems with blood clotting. While blunt trauma to the<unk>  does not present a risk of shock due to hemorrhage, penetrating<unk>  trauma does.
types of Head injury
symptom of Stroke
medical cause of Infection
symptom of Birth defect
History of neurology and neurosurgery
symptom of Cardiovascular disease
symptom of Congenital heart defect
symptom of Subarachnoid hemorrhage