Parkinson's Disease
Description: Degenerative disease process (associated with aging) that affects the basil ganglia of the brain.
Cause: Associated with a deficiency of the neurotransmitter dopamine.
Effects: The most common symptom is tremor, which often affects one hand, spreading first to the leg on the same side, then to the other limb. It is most profound in resting limbs, interfering with such actions as holding a cup. A patient will usually have a expressionless face, an unmodulated face, an increasing tendency to stoop, and a shuffling walk.