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Brain damage can occur both during and after oxygen deprivation. During oxygen deprivation, cells die due to an increasing acidity in the brain tissue . Additionally, during the period of oxygen deprivation, materials that can easily create free radicals build up. When oxygen enters the tissue these materials interact with oxygen to create high ...
Hypoxia can be due to external causes, when the breathing gas is hypoxic, or internal causes, such as reduced effectiveness of gas transfer in the lungs, reduced capacity of the blood to carry oxygen, compromised general or local perfusion, or inability of the affected tissues to extract oxygen from, or metabolically process, an adequate supply ...
All commonly abused inhalants act as asphyxiant gases, although a common myth is that their primary effects are only due to oxygen deprivation. In reality, the majority of abused inhalants still exhibit psychoactive effects, [68] although oxygen deprivation does add to the notable effects.
Low oxygen levels in the blood (hypoxia or anoxia) have been hypothesized to induce hallucinations and hence possibly explain NDEs. [ 18 ] [ 49 ] This is because low oxygen levels characterize life-threatening situations and also the apparent similarities between NDEs and G-force-induced loss of consciousness ( G-LOC ) episodes.
Brain rapidly uses up oxygen (O 2) available in the pooled blood. O 2 concentration in the brain drops. Unconsciousness from hypoxia of cerebral tissue. Because the brain cannot store reserves of oxygen and, unlike other organs, has an exceedingly low tolerance of oxygen deprivation, it is highly vulnerable if vasoconstriction is not reversed.
Generalized hypoxia is a medical condition in which the tissues of the body are deprived of the necessary levels of oxygen due to an insufficient supply of oxygen, which may be due to the composition or pressure of the breathing gas, decreased lung ventilation, or respiratory disease, any of which may cause a lower than normal oxygen content in the arterial blood, and consequently a reduced ...
The One Direction star was high on the dangerous substance “Cristal.”
The most common cause of cortical blindness is ischemia (oxygen deprivation) to the occipital lobes caused by blockage to one or both of the posterior cerebral arteries. [2] However, other conditions have also been known to cause acquired and transient cortical blindness, including: Congenital abnormalities of the occipital lobe [5]