Modified Hoehn and Yahr Scale for Parkinson’s Disease
Grades severity of symptoms in Parkinson’s disease.
Unilateral involvement only
Unilateral and axial involvement
Bilateral involvement without impairment of balance
Mild bilateral disease with recovery on pull test
Mild to moderate bilateral disease; some postural instability; physically independent
Severe disability; still able to walk or stand unassisted
Wheelchair bound or bedridden unless aided
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