Closed eyes
Irregular breathing
No response of limbs, except for reflexes
No response to pain, except for reflexes
Pupils not responding to light
Unresponsiveness
A buildup of toxins in the body, such as ammonia, urea, or carbon dioxide
Electrolyte imbalance
Exposure to toxins such as carbon monoxide poisoning
Heavy metal poisoning like lead poisoning
Lack of oxygen (Hypoxia)
Overdose of Drugs and alcohol
Severe inflammation of the brain, and spinal cord
Neurologist
Psychiatrist