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brains produce measurable levels of electrical activity in specific patterns. If the brain is no longer working it no longer produces electrical activity in pattern and is considered "dead", as in no longer capable of thought.

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16y ago
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10y ago

When someone is brain dead, it means there is no activity going on at all in the brain and it will never come back. Other parts of the body might still be working, but the brain is essentially dead, hence the term.

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Q: What does it mean when someone is brain dead?
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What does dead from the neck up mean?

It implies that there is no brain activity, so someone who is very foolish or stupid.

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If their heart, breathing, and brain activity have stopped, they are dead.

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It means that no electrical activity is recorded on an electroencephalogram (EEG). We know that without electrical impulses in the brain it is impossible for a person to ever recover, so even if the rest of the body hasn't died yet (and it will soon) the person is said to be "brain dead."

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