A coma scale is a way for doctors to measure how awake or asleep a person is after they've had an injury or illness that affects their brain. Basically, it's like a ruler that measures how much a person's brain is working.
The coma scale has three parts: eye response, verbal response, and motor response.
For eye response, the doctor looks to see if the person's eyes are open, and if so, how they are reacting. If the person's eyes are closed and they can't be opened by talking to them or touching them, they get a score of 1. If they do open their eyes but don't seem to be looking at anything, they get a score of 2. And if they open their eyes and look around, they get a score of 3.
For verbal response, the doctor talks to the person to see if they can speak or make any sounds. If they don't respond at all, they get a score of 1. If they make sounds but don't say anything meaningful, they get a score of 2. And if they can speak and have a conversation, they get a score of 3.
For motor response, the doctor moves the person's arms and legs to see if they can move or if they're stiff. If they don't move at all, they get a score of 1. If they can move, but it's not coordinated or purposeful, they get a score of 2. And if they can move purposefully and normally, they get a score of 3.
Once the doctor has scored each of these three parts, they add them up to get a total score. The lowest possible score is 3, which means the person is in a deep coma and not responding at all. The highest possible score is 15, which means the person is fully awake and aware. The scores in between show different levels of consciousness, with higher scores meaning the person is more aware.
Doctors use the coma scale to help them understand how serious a person's brain injury or illness is, and to track their progress as they recover. By measuring the person's responses in a consistent, objective way, doctors can make better decisions about how to care for them and what treatments to use.