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Old 10-20-2011
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Question
A 68-year-old man went to a sleep clinic after he had repeated episodes of loud snoring during sleep, coupled with sudden periods of restlessness and cessation of breathing. After extensive analysis, the physicians concluded that the patient's problem was not a result of obstructive sleep. Instead, it was judged that this condition reflected central sleep apnea due to loss of chemoreceptor sensitivity of the neuronal control mechanisms governing respiration. Which of the following sites within the CNS is most closely associated with these effects?
A.
Dorsal horn of the thoracic spinal cord

B.
Reticular formation of the medulla

C.
Midbrain periaqueductal gray

D.
Hippocampal formation

E.
Border of occipital and parietal lobes
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Old 10-20-2011
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b) reticular formation of medulla
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Old 10-21-2011
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Old 10-21-2011
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B.
Reticular formation of the medulla
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Old 10-21-2011
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reticular formation of medulla has central receptors
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Old 10-22-2011
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B.
Reticular formation of the medulla
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Old 10-22-2011
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B.reticular formation of medulla.

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