comatose
sleep
You cannot create a state of unconsciousness in a person. Its impossible!
Anyone who is in a deep or prolonged state of unconsciousness, usually due to an illness or injury, is considered to be comatose.
A state of total unconsciousness is called Coma
A vertebra is a bone of the spine, they have nothing directly to do with a state of unconsciousness.
Coma stands for "Cerebral or Central Nervous System Opiate-Mediated Respiratory Depression." It refers to a state of deep unconsciousness resulting from severe brain injury, illness, or drug overdose.
NARCOSIS
This sounds like a description of syncope, also known as fainting. It occurs when there is a temporary reduction in blood flow to the brain, leading to a brief loss of consciousness. Most people regain consciousness on their own when lying flat and receiving adequate blood flow to the brain.
STUPOR
No. Exams of patients with encephalitis (inflammation of the brain) usually reveal a drowsy or confused patient but not in a coma. A person in a coma state can not be aroused.
It means: comma (as in punctuation) OR a coma as in a state of unconsciousness.
Not conscious; unaware