Final answer:
Parkinson's disease is the disease related to abnormal levels of dopamine. Loss of dopamine neurons in the brain leads to symptoms such as tremors, slowed movement, and rigidity. Treatment aims to increase dopamine levels in the brain.
Step-by-step explanation:
Parkinson's disease is the disease related to abnormal levels of dopamine. Dopamine neurons in the substantia nigra, a midbrain structure, are lost in Parkinson's disease, leading to symptoms such as tremors, slowed movement, speech changes, balance and posture problems, and rigid muscles. Treatment for Parkinson's disease is aimed at increasing dopamine levels in the striatum through medications like L-DOPA.