Coma ... A coma is a prolonged state of deep unconsciousness in which a person cannot be awakened, fails to respond normally to painful stimuli, light, or sound, lacks a normal sleep …

Nov 30, 2025 · Summary 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 …

Nov 26, 2024 · Coma is a state of prolonged loss of consciousness. It can have a variety of causes, including traumatic head injury, stroke, brain tumor, or drug or alcohol intoxication.

Aug 6, 2025 · Scientists are investigating new ways to bring patients back from a vegetative state—and raising uncomfortable questions about the limits of consciousness.

A coma is a state of prolonged unconsciousness where a person is unresponsive and unable to wake up.

Aug 25, 2025 · A coma is a deep unconscious state where you can’t wake up or respond, even to pain or loud sounds. Head injuries, strokes, infections or overdoses, among other things, can …

Coma is defined as a state of deep unconsciousness, an eyes-closed unresponsive state. Coma is usually a transitory state though it may last for an indefinite or even prolonged period. …

Jun 19, 2025 · A coma is a type of deep unconsciousness. Its causes, treatment, and outlook can vary per person. Learn more about coma, including its causes and outcomes.

Dec 11, 2025 · Coma, state of unconsciousness, characterized by loss of reaction to external stimuli and absence of spontaneous nervous activity, usually associated with injury to the …

May 25, 2024 · A coma is a state of deep unconsciousness in which a person is unresponsive for a prolonged time. Although comas have many possible causes, they all involve temporary or …