Stopping the blood supply to the brain for 20 seconds causes loss of consciousness; resuscitation is possible if clinical death lasts

Stopping the blood supply to the brain for 20 seconds causes loss of consciousness; resuscitation is possible if clinical death lasts no more than 5-6 minutes. What features of the nerve centers is it connected with?

Nerve cells in the brain consume 25% of the body’s energy, so if blood supply is disturbed, a serious energy crisis occurs, and neurons quickly die. The activity and efficiency of the brain depends not only on the number of neurons in a state of excitation, but also on the number of interconnections between them. After the death of a part of the neurons, the neuronal bridges that connect them break, that is, some parts of the brain cease to function, and these changes are irreversible.