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A coma is a deep state of unconsciousness. An individual in a coma is alive but unable to move or respond to his or her environment. Coma may occur as a complication of an underlying illness, or as a result of injuries, such as brain injury.
A coma rarely lasts more than 2 to 4 weeks. The outcome for coma depends on the cause, severity, and site of the damage. People may come out of a coma with physical, intellectual, and psychological problems. Some people may remain in a coma for years or even decades. For those people, the most common cause of death is infection, such as pneumonia.
NIH: National Institute of Neurological Disorders and Stroke
- Coma (National Institute of Neurological Disorders and Stroke) Also in Spanish
- Stupor and Coma (Merck & Co., Inc.) Also in Spanish
- Cerebral Hypoxia (National Institute of Neurological Disorders and Stroke) Also in Spanish
- Locked-In Syndrome (National Institute of Neurological Disorders and Stroke)
- Traumatic Brain Injury (TBI) (National Institute of Neurological Disorders and Stroke) Also in Spanish
- Diabetic Coma (Mayo Foundation for Medical Education and Research) Also in Spanish
- ClinicalTrials.gov: Coma (National Institutes of Health)
- ClinicalTrials.gov: Persistent Vegetative State (National Institutes of Health)
Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine)
- Article: Brimonidine eye drops reveal diminished sympathetic pupillary tone in comatose patients...
- Article: Multimodal Prediction of Favorable Outcome After Cardiac Arrest: A Cohort Study.
- Article: Machine learning and network analysis for diagnosis and prediction in disorders...
- Coma -- see more articles