Dopamine:A neurotransmitter involved in controlling movement and posture, modulating mood, and playing a critical role in reward and motivational pathways.
Parkinson's disease: A neurodegenerative disorder characterized by the death of dopamine-producing cells in the substantia nigra pars compacta, leading to symptoms such as tremors, stiffness, and difficulty with balance and coordination.
Midbrain:The middle portion of the brainstem that plays an important role in motor movement, particularly movements of the eye, and in auditory and visual processing