What Happens in the Brain During a Coma?

The video explores the differences between comas and sleep, highlighting that comas are disorders of consciousness caused by brain damage. It explains that comas involve reduced brain activity and lack the regular sleep cycles, such as REM. The cerebral cortex in comas shows some sensory activity but lacks proper processing. The video also discusses the disruption of internal and external awareness networks in comas, comparing them to general anesthesia. Recovery from comas varies, and studying them helps understand consciousness and brain function.

What is the primary difference between a coma and sleep?

• A coma involves more brain activity than sleep.

• A coma is similar to being under general anesthesia.

• A coma patient can respond to external stimuli.

• A coma is a state of heightened awareness.

How does the brain's energy usage in a coma compare to when it is awake?

• It uses more energy than when awake.

• It uses slightly more energy than during deep sleep.

• It uses the same amount of energy as when awake.

• It uses significantly less energy than when awake.

Why do coma patients likely not experience dreams?

• Their brains are too active to dream.

• Their brains do not enter REM sleep cycles.

• They are constantly aware of their surroundings.

• They are in a state of heightened awareness.

What happens to sensory signals in the brain during a coma?

• They are completely blocked.

• They are processed normally.

• They are enhanced and more vivid.

• They are not processed normally.

How are internal and external awareness networks affected in a coma?

• Both internal and external awareness are disrupted.

• Only internal awareness is disrupted.

• Neither internal nor external awareness is disrupted.

• Only external awareness is disrupted.