For example, although one major medical dictionary considers "brain death" to be synonymous with "cerebral death" (death of the cerebrum), the US National Library of Medicine Medical Subject Headings (MeSH) system defines brain death as including the brainstem. Various parts of the brain may keep functioning when others do not anymore, and the term "brain death" has been used to refer to various combinations. A differential diagnosis can medically distinguish these differing conditions.īrain death is used as an indicator of legal death in many jurisdictions, but it is defined inconsistently and often confused by the public. It is also distinct from comas as long as some brain and bodily activity and function remain, and it is also not the same as the condition locked-in syndrome. It differs from persistent vegetative state, in which the person is alive and some autonomic functions remain. For other uses, see Brain Dead.īrain death is the permanent, irreversible, and complete loss of brain function which may include cessation of involuntary activity necessary to sustain life.
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