Dopamine and acetylcholine are both important neurotransmitters in the body, and they act antagonistically to each other. When the balance between the two is maintained under normal conditions, the body can function normally. When the balance is imbalanced, a series of movement disorders can occur, such as Parkinson’s disease, in which the loss of dopaminergic neurons in the nigrostriatal system, mainly caused by degeneration and apoptosis, leads to a decrease in dopamine production in the brain, causing a relative hyperactivity of acetylcholine, resulting in increased muscle tone, abnormal posture and gait, motor retardation, and resting The result is increased muscle tone, abnormal posture and gait, bradykinesia, and resting tremor. Increased motor activity is seen in hyperdopaminergic function with suppressed acetylcholine, such as various types of chorea, eccentric throwing movements, and ADHD.