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Brain injury as a result of oxygen deprivation either due to hypoxic or anoxic mechanisms is generally termed hypoxic/anoxic injury (HAI). Hypoxic ischemic encephalopathy ( HIE ) is a condition that occurs when the entire brain is deprived of an adequate oxygen supply, but the deprivation is not total.
Toxic encephalopathy is a neurologic disorder caused by exposure to neurotoxic organic solvents such as toluene, following exposure to heavy metals such as manganese, as a side effect of melarsoprol treatment for African trypanosomiasis, adverse effects to prescription drugs, or exposure to extreme concentrations of any natural toxin such as cyanotoxins found in shellfish or freshwater ...
Anoxic depolarization is a progressive and uncontrollable depolarization of neurons during stroke or brain ischemia in which there is an inadequate supply of blood to the brain. [1] Anoxic depolarization is induced by the loss of neuronal selective membrane permeability and the ion gradients across the membrane that are needed to support ...
Toxic-metabolic encephalopathy: A catch-all for brain dysfunction caused by infection, organ failure, or intoxication. Transmissible spongiform encephalopathy : A collection of diseases all caused by prions, and characterized by "spongy" brain tissue (riddled with holes), impaired locomotion or coordination, and a 100% mortality rate.
For example, some forms of chronic drug or alcohol dependence can cause organic brain syndrome due to their long-lasting or permanent toxic effects on brain function. [6] Other common causes of chronic organic brain syndrome sometimes listed are the various types of dementia , which result from permanent brain damage due to strokes, [ 7 ...
One of the leading theories behind Alzheimer’s disease is that the toxic accumulation of the proteins beta-amyloid and tau in the brain can cause many of the symptoms related to this condition.
Prolonged hypoxia induces neuronal cell death via apoptosis, resulting in a hypoxic brain injury. [34] [35] Oxygen deprivation can be hypoxic (reduced general oxygen availability) or ischemic (oxygen deprivation due to a disruption in blood flow) in origin. Brain injury as a result of oxygen deprivation is generally termed hypoxic injury.
Toxic exposures to methionine sulfoximine, cuprizone, isoniazid, triethyltin, hexachlorophene, and hydrogen cyanide have been associated with cytotoxic edema and swelling of astrocytic cells. [21] Hypoxia, anoxia can lead to cytotoxic edema through several mechanisms [18]