View credits, reviews, tracks and shop for the CD release of "Deep Sleep" on Discogs. This is Jewel case version. Comatose - "Deep Sleep" released in 3 versions: Cardboard sleeve (Iron Works) limited to copies. encountered in the vegetative state makes it utterly difficult to identify possible REM sleep other than by the presence of muscular. It is now well-known that comatose patients with pathological lesions of the pons may have EEGs with background activity resembling alpha rhythms of. They showed disturbances in wakefulness during sleep and REM sleep during recovery from coma., Symptoms of insomnia were reported. However, unlike in a deep sleep, the person cannot be awakened by any stimulation, including pain. What Causes a Coma? Comas are caused by an. A coma is a deep state of prolonged unconsciousness in which a person cannot be awakened, fails to respond normally to painful stimuli, light, or sound. The Deepest Sleepers Coma-like sleep is characterized by a deep sleep devoid of movement. Sleeping so deeply it appears coma-like is only an issue if it. A coma is a state of unconsciousness you can't be awakened from. The brain doesn't go through normal sleep cycles and you can't move in response. Coma is a state of consciousness that is similar to deep sleep, except no amount of external stimuli (such as sounds or sensations) can prompt the brain to.