71. The author mainly discusses neurologist understanding of ____.

1. brain-damaged patients who have some hope of recovering awareness
2. the whole range of people living with brain injuries
3. the physiology behind a wide range of unconsciousness
4. clues to the specific brain processes that sustain conscious awareness

72. The goal of the researches on unconscious states is ____.

1. to allow clearer distinctions to be made
2. to make it easier for doctors to make judgments
3. to gain a better understanding of what consciousness is
4. to help patients in comas emerge from this state

73. Which of the following does the author say in the article?

1. It was the consensus of the neurologists in diagnosing the condition of Ms. Schiavo.
2. Researchers may never understand the physiology behind unconscious states.
3. People in comas never move or make sounds.
4. Those that have less severe brain damages may never awaken.

74. Persistent vegetative state was first diagnosed ____.

1. in 1994
2. in 1990
3. before 1972
4. in 1972

75. It is suggested in the passage that ____.

1. no unconscious patients can emerge from their states
2. there exists another state of subdued responsiveness
3. all brain damages are caused by a persistent vegetative state
4. it was in 1994 that the modern study of disorders of consciousness began

(Reference keys.)