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www.braininjury-explanation.com/causes-disorders/brain-injury-by-lack-of-oxygen

This is called diffuse brain damage = damage anywhere in the brain. In particular, the temporal lobe (at the temples) is sensitive to oxygen deficiency which is also where the memory is situated. A lack of oxygen from three to nine minutes can result in irreversible brain damage!

www.spinalcord.com/blog/what-happens-after-a-lack-of-oxygen-to-the-brain

Not all brain injuries involve a blow to the head or lesion. Indeed, your brain can be injured even when nothing comes into contact with your head. Anoxic brain injuries occur when the brain is deprived of oxygen. The aftermath of a lack of oxygen to the brain is largely dependent on the extent of the oxygen deprivation.

www.healthtap.com/topics/irreversible-brain-damage-from-lack-of-oxygen

Doctors give unbiased, trusted information on the benefits and side effects of Oxygen to treat Brain Injury: Dr. Davis on irreversible brain damage from lack of oxygen: Snoring results from vibration emitted from the upper airways, for instance a sides of the nostrils moving toward the septum during inhalation or more likely from vibration of the soft palate, uvula & perhaps tongue.

en.wikipedia.org/wiki/Cerebral_hypoxia

Cerebral hypoxia is a form of hypoxia (reduced supply of oxygen), specifically involving the brain; when the brain is completely deprived of oxygen, it is called cerebral anoxia.There are four categories of cerebral hypoxia; they are, in order of severity: diffuse cerebral hypoxia (DCH), focal cerebral ischemia, cerebral infarction, and global cerebral ischemia.

braininjuryfoundation.org

The Brain Injury Foundation. The Brain Injury Foundation is dedicated to the prevention of brain damage caused by lack of oxygen and bloodflow to the brain. This injury is known as Hypoxic (low oxygen) Ischemic (low bloodflow) Injury, or HII. Without oxygen reaching the brain, irreversible brain damage starts to occur within 5 minutes.

www.wisegeek.com/how-long-can-the-brain-be-without-oxygen-before-brain-damage.htm

In general, the brain can withstand up to three to six minutes without oxygen before brain damage occurs, but this may vary from person to person. If the brain goes without oxygen longer than this, serious and often irreversible damage is likely to take place. After ten minutes, severe neurological damage has generally occurred.

www.sleepresolutions.com/blog/does-sleep-apnea-cause-brain-damage

This feast-or-famine type of oxygen delivery system is difficult for the brain and other organs of the body to deal with, and the lack of oxygen causes cell damage to occur. Sleep Apnea Side Effects Sleep apnea causes oxygen starvation to the cells in the body and affects almost every organ in the human body.

www.sciencedaily.com/terms/brain_damage.htm

Brain damage or brain injury is the destruction or degeneration of brain cells. Brain damage may occur due to a wide range of conditions, illnesses, or injuries. Possible causes of widespread ...

medlineplus.gov/ency/article/001435.htm

Cerebral hypoxia occurs when there is not enough oxygen getting to the brain. The brain needs a constant supply of oxygen and nutrients to function. Cerebral hypoxia affects the largest parts of the brain, called the cerebral hemispheres. However, the term is often used to refer to a lack of oxygen supply to the entire brain.

lunginstitute.com/blog/oxygen-and-brain-damage

Oxygen is essential to a properly functioning body. In fact, the brain requires a constant supply of glucose and oxygen. However, if you have a chronic lung disease such as emphysema, pulmonary fibrosis or COPD, having enough blood oxygen can be challenging. Lack of oxygen to the brain can cause brain damage in minutes.