The symptoms of Parkinson disease become apparent when approximately _____ of cells die in the _____ dopamine pathway.
A)25% to 30%; nigrostriatal
B)35% to 50%; mesolimbic
C)60% to 80%; nigrostriatal
D)90% to 100%; mesolimbic

Question

Quizplus · Accepted Answer

Parkinson's disease symptoms typically become apparent when 60% to 80% of the dopamine-producing cells in the nigrostriatal pathway have died.

The Symptoms of Parkinson Disease Become Apparent When Approximately _____