brain death


brain death

noun

medical : the condition of having no brain function : the end of activity in the brain

Full Definition of BRAIN DEATH

:  final cessation of activity in the central nervous system especially as indicated by a flat electroencephalogram for a predetermined length of time

First Known Use of BRAIN DEATH

1964

brain death

noun    (Medical Dictionary)

Medical Definition of BRAIN DEATH

: final cessation of activity in the central nervous system especially as indicated by a flat electroencephalogram for a predetermined length of time
brain–dead adjective

brain death

noun    (Concise Encyclopedia)

State of irreversible destruction of the brain. Before the invention of life-support systems, brain death always led quickly to death of the body. Ethical considerations are crucial to defining criteria for brain death, which in most countries must be met before efforts to extend life may be ended. Such criteria include deep coma with a known cause, absence of any brainstem functions (e.g., spontaneous respiration, pupil reactions, gag and cough reflexes), and exclusion of hypothermia, drugs, and poison as causes. Electroencephalography is useful but not essential in determining brain death. Organ donors must be declared brain-dead before their organs may be removed for transplant. The question of when life support can legally be ended has been the subject of numerous court cases.

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