Anne Heche is suffering from an anoxic brain injury

Actress Anne Heche has been on life support and is not expected to survive after crashing her car into two homes last Friday

Heche, 53, has been hospitalized since the accident

here she was allegedly speeding in her blue Mini Cooper

crashed into one home and then another, leaving the second in flames.

She is suffering from an anoxic brain injury.

Anoxic brain injuries happen when all oxygen is cut off from the brain.

After about four minutes of losing oxygen supply, brain cells begin to die off

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