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Glossary for Lack of consciousness conditions

  • Apallic syndrome: A persistent vegetative state caused by brain damage.
  • Basedow's coma: A coma that occurs prior to death from severe hyperthyroidism.
  • Coma: Prolonged unconsciousness
  • Decreased LOC: measurement of a person's arousability and responsiveness to stimuli from the environment
  • Decreased level of consciousness: A persistent coma is called vegetative state.
  • Familial neurocardiogenic syncope: A familial disorder where a patient is prone to fainting due to a sudden drop in blood pressure.
  • Hepatic encephalopathy like coma: Altered level of consciousness can occur in conditions apart from hepatic encephalopathy.
  • Myxedema coma: Myxedema coma is a rare, life-threatening condition, occurs late in the progression of hypothyroidism. The condition is seen typically in elderly women and is often precipitated by infection, medication, environmental exposure, or other metabolic-related stresses.
  • Persistent Vegetative State: Physically alive with basic mental function but without high mental capacity.
  • Syncope: Temporary loss of conciousness or fainting.
  • Syncope, familial neurocardiogenic: A familial condition where a person suffers an increased tendency to faint due to a sudden drop in blood pressure.
  • Unconsciousness: Loss of consciousness that may result from a wide variety of causes. An unconscious person is usually completely unresponsive to their environment or people around them. Unconsciousness can occur as a result of brain injury, lack of oxygen or poisoning as well as numerous other conditions.


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