What is the term for the cause of brain injury due to a lack of oxygen?

The term for the cause of brain injury due to a lack of oxygen is described by the phrase "loss of oxygen." When the brain does not receive sufficient oxygen, a condition known as hypoxia can occur. This can lead to various forms of brain injury, as oxygen is vital for brain function. Without adequate oxygen, neurons can begin to die within minutes, resulting in potential cognitive impairments or even permanent disability.

Other options, while they may relate to conditions affecting the brain, do not specifically denote the cause tied to an oxygen deficiency. Stroke, for example, involves a disruption of blood flow that may lead to a loss of oxygen but is a broader term encompassing various mechanisms of injury, including hemorrhagic or ischemic events. Infectious diseases can cause inflammation and other impacts on brain function, but they don't directly pinpoint oxygen deprivation as a cause. Tumors can exert pressure and affect blood flow, but they are not synonymous with the absence of oxygen itself. Thus, the phrase "loss of oxygen" accurately identifies the specific mechanism by which brain injury can arise from oxygen deprivation.