The geriatrician providing care for a 74-year-old man with diagnosis of Parkinson disease has recently changed the client’s medication regimen. What is the most likely focus of the pharmacologic treatment of the man’s health problem?
A. Increasing the functional ability of the underactive dopaminergic system
B. Maximizing acetylcholine release from synaptic vesicles at neuromuscular junctions
C. Preventing axonal degradation of motor neurons
D. Preventing demyelination of the efferent cerebellar pathways