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Brain Lifespan

This forum is for questions and support regarding neurology issues such as: Alzheimer's Disease, ALS, Autism, Brain Cancer, Cerebral Palsy, Chronic Pain, Epilepsy, Fibromyalgia, Headaches, MS, Neuralgia, Neuropathy, Parkinson's Disease, RSD, Sleep Disorders, Stroke, Traumatic Brain Injury

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MedHelp Member's Question

Brain Lifespan

by Bagocius, May 12, 2008 11:13AM

Tags: brain

How long can the human brain be kept alive and in working condition after death?

Member Comments (1)

by doctornee

, May 15, 2008 01:54AM

To: Bagocius

Hi ! A very interesting question. Well if you consider clinical death, that is when blood circulation and breathing (respiration) stops, then the brain activity stops within 20 to 40 seconds. If the respiration and blood circulation is still not revived, that is all medical attempts to revive the patient fails for 3 minutes or more, no oxygen reaches brain, and brain too dies (ischemic death). If after 3 minutes the circulation and respiration is revived, parts or whole of brain may suffer irrepairable damage. So The human brain can be kept alive and in working condition safely for less than 3 minutes.

However there is another term called "brain death". This is an irreversible condition, and brain has no activity, including involuntary activity necessary to sustain life. This occurs after approximately 3 or more minutes of clinical death.

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