When the brain doesn't receive an adequate supply of oxygen, a condition known as hypoxia occurs. This can lead to a range of symptoms and potentially serious consequences. The brain is particularly sensitive to oxygen deprivation because it has a high metabolic rate and limited energy reserves. Here's a step-by-step breakdown of what happens: 1. Initial Symptoms: At first, mild hypoxia can cause symptoms like shortness of breath, rapid breathing, increased heart rate, confusion, and restlessness. 2. Cellular Level: Cells in the brain require oxygen to produce energy through a process called cellular respiration. Without sufficient oxygen, cells cannot produce enough adenosine triphosphate (ATP), which is the main energy source for cellular functions. 3. Neurological Effects: As oxygen levels decrease, brain cells start to malfunction. This can lead to impaired cognitive function, loss of consciousness, and eventually, brain damage. 4. Stroke and Brain Damage: Prolonged oxygen deprivation can cause parts of the brain to die, a condition known as an ischemic stroke. This happens because the brain's blood supply, which carries oxygen, is compromised. 5. Potential Long-Term Effects: Depending on the severity and duration of the oxygen deprivation, the brain may suffer permanent damage, leading to cognitive impairments, physical disabilities, or even death. read more >>

Ischemic stroke happens when part of the brain is injured because it isn't getting enough blood. The brain needs a constant supply of blood, which carries oxygen and other nutrients. The brain cannot survive for long without the oxygen carried by the blood.read more >>