二、問答題:
1. Recent research indicates that Parkinson disease damages thesympathetic division of the peripheral nervous system. One test forsympathetic division function, called the Valsalva maneuver, requires thepatient to blow against resistance. A functional nervous system willcompensate for the decrease in blood output from the heart bycompensate for the decrease in blood output from the heart byconstricting blood vessels. How do you suppose Parkinson patientsrespond to the Valsalva maneuver? How does this relate to a commoncondition in Parkinson patients, called orthostatic hypotension, in whichblood pressure falls suddenly when the person stands up, leading todizziness and fainting? (20 points)