The brain, as the “command center” of the human body, is extremely sensitive to the demand for oxygen. Although the brain only accounts for about 2% of the human body weight, the amount of oxygen it consumes accounts for about 20% – 25% of the total oxygen consumption of the whole body. Sufficient oxygen supply is the cornerstone of the normal operation of the brain. When the brain obtains sufficient oxygen, the signal transmission between neurons becomes smoother, ensuring that the brain is quick – witted and has a good memory. Neurons transmit information through synapses, and this process requires a large amount of energy, and oxygen is the key substance for generating energy. With the participation of sufficient oxygen, glucose can be fully oxidized and decomposed to produce enough adenosine triphosphate (ATP) to provide energy for the activities of neurons. The hippocampus in the brain is an area closely related to memory. Sufficient oxygen supply can maintain the normal functions of neurons in the hippocampus and promote the formation and consolidation of memory.

Once the brain is hypoxic, various discomfort symptoms will follow. Initially, symptoms such as dizziness, headache, and inattention may occur. As the hypoxia time prolongs, memory loss will also occur. When the study or work intensity is high, the oxygen consumption of the brain increases sharply. At this time, appropriate oxygen inhalation can quickly relieve brain fatigue. For example, during the college entrance examination preparation period, many students inhale oxygen to improve their learning efficiency. Within 1 – 2 hours after inhaling oxygen, their learning concentration is significantly improved. This is because oxygen inhalation can provide sufficient oxygen for the brain, improve the metabolic state of the brain, and reduce fatigue. For some patients with brain diseases, such as patients with cerebral insufficiency and cerebral infarction, oxygen therapy is an important adjuvant treatment method. Oxygen inhalation can improve the blood circulation in the brain, provide sufficient oxygen and nutrients for damaged nerve cells, and promote the recovery of nerve function. Research shows that for cerebral infarction patients who receive early oxygen therapy, the speed and degree of their nerve function recovery are significantly better than those of patients who do not receive oxygen therapy. In a rehabilitation study on cerebral infarction patients, it was found that the language and limb function recovery of patients who received oxygen therapy was significantly better than that of patients who did not receive oxygen therapy after three months, which fully demonstrates the important role of oxygen inhalation in the treatment of brain diseases.