Abstract
How does Parkinson's disease present?The cardinal symptoms of Parkinson's disease are shaking, stiffness, and slowness and poverty of movement. The condition leads to physical signs including tremor at rest, rigidity on passive movement, slowness of movement (bradykinesia), and poverty of movement (hypokinesia). These features are unilateral at onset, but become bilateral as the condition progresses. Later, postural instability and falls, orthostatic hypotension, and dementia can develop.