What happens when you get knocked out? Or what happens when you get knocked unconscious? On Doc Talk with Dr. Chris, that's what he is discussing today. This will be a regular series right here on our Human 2.0 channel. You can ask questions yourself in the comment section, on any of our social media, or you can check Dr. Chris' LIVESTREAM every Sunday night from 7 to 8 pm EST, where you can ask him questions directly.
As for what happens when you get knocked out, or what happens when you get knocked unconscious, what happens when you suffer from a brain injury or head trauma, consider the following information from BRAINFACTS.ORG:
"You’ve seen it on television — a character on a show or a professional athlete on the field receives a sharp blow to the head, and crumples on the ground, completely unconscious. A knockout blow is a traumatic brain injury or concussion, but not every concussion means a loss of consciousness. Christopher Giza, professor of pediatric neurology and neurosurgery at UCLA, explains what happens when you’re knocked out, how it’s different from the average concussion, and the best course of action following a knock-out blow.
What does it mean to be knocked unconscious?
Your brain has three big parts. There’s the left hemisphere, the right hemisphere, and the brainstem at the bottom. You can lose consciousness if both hemispheres are turned off at once — though if only one is affected, the other can pick up some of the slack. You can also lose consciousness if part of the brainstem is knocked offline. Brain activity can be affected by a number of things — oxygen can be cut off to certain parts, or a blood vessel might burst. But a blow to the head can also cause a disruption that could lead to a loss of consciousness.
Think about the brain as firm jello. The two hemispheres are heavy, and the brainstem connecting the two hemispheres to the rest of the nervous system is narrow, like the stem of a flower. When the head is moved violently, [or when you get knocked out] the brain moves around in the skull. The heaviest part of the brain puts a lot of pressure on the brainstem, which can be twisted and pulled during the blow as the rest of the brain moves out of place. That twisting and pulling can cause brain circuits to break, or lose their insulation, or get kinked up, and that shuts off parts of the brain. If the part of the brainstem responsible for consciousness is affected, then you would be knocked out."
Doctor Chris explains this in his own words. This is his version of what happens when you get knocked out? Interesting question, and an interesting answer. Here are the time points for the video:
00:25:08 Think of your brain as a computer
01:05:17 When you suffer an impact injury to the brain or what happens when you get knocked out
02:24:34 Brain suffers a short circuit
02:54:45 Body is trying to protect itself
03:27:51 Bathe organs in blood
04:19:25 Restore blood flow so power can come back on
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