Unified Parkinson Disease Rating Scale Calculator
Score motor examination findings using the UPDRS Part III for Parkinson disease. Enter values for instant results with step-by-step formulas.
Reviewed by Rahul Singh, Health & Wellness Specialist
Formula
Total UPDRS Part III = Sum of all motor examination item scores (each 0-4)
Each of the motor examination items is scored from 0 (normal) to 4 (severe). The total score represents the sum across all items. Subscores for rigidity, bradykinesia, tremor, and axial function provide additional clinical insight.
Worked Examples
Example 1: Early-Stage Parkinson Disease Assessment
Problem:A 58-year-old man with 2-year history of right hand tremor and mild slowness. Examination shows slight right-sided rest tremor, mild right upper extremity rigidity, mild finger tapping decrement on the right, and slight facial masking.
Solution:Motor Exam Findings:\nSpeech: 0, Facial expression: 1\nRigidity: Neck 0, RUE 2, LUE 0, RLE 0, LLE 0 = 2\nBradykinesia: Finger tap R 2, L 0; Hand movements R 1, L 0; PS R 1, L 0; Toe tap R 0, L 0; Leg agility R 0, L 0; Body 1 = 5\nTremor: Postural 1, Kinetic 0, Rest amplitude 2, Constancy 2 = 5\nAxial: Arising 0, Gait 1, Postural stability 0 = 1\nTotal UPDRS Part III: 14/100
Result:UPDRS Part III Score: 14 - Mild motor impairment, predominantly right-sided, tremor-dominant phenotype
Example 2: Advanced Parkinson Disease - OFF State
Problem:A 72-year-old woman with 12-year disease history assessed in OFF state. She shows severe bilateral bradykinesia, moderate rigidity in all limbs, significant gait difficulty, and postural instability.
Solution:Motor Exam Findings:\nSpeech: 3, Facial expression: 3\nRigidity: Neck 2, RUE 3, LUE 3, RLE 2, LLE 2 = 12\nBradykinesia: All upper extremity items 3 each (6 items x 3) = 18; Lower extremity 3 each (4 items x 3) = 12; Body 3 = 33\nTremor: Postural 1, Kinetic 1, Rest 2, Constancy 3 = 7\nAxial: Arising 3, Gait 3, Postural stability 3 = 9\nTotal UPDRS Part III: 64/100
Result:UPDRS Part III Score: 64 - Severe motor impairment in OFF state; DBS evaluation warranted if ON-state shows >30% improvement
Frequently Asked Questions
How does the UPDRS help in distinguishing Parkinson disease from other conditions?
The UPDRS Part III pattern of findings can help differentiate idiopathic Parkinson disease from other parkinsonian disorders, though it is not diagnostic on its own. Classic Parkinson disease typically shows asymmetric findings with one side more affected than the other, prominent rest tremor, good response to levodopa (significant improvement in UPDRS Part III ON versus OFF), and predominant bradykinesia-rigidity. In contrast, multiple system atrophy often shows more symmetric findings with prominent autonomic dysfunction, progressive supranuclear palsy shows early axial rigidity and postural instability with minimal tremor, and vascular parkinsonism predominantly affects the lower body. The pattern of subscore distribution across rigidity, bradykinesia, tremor, and axial categories provides valuable clinical information for differential diagnosis.
References
- Goetz CG et al. Movement Disorder Society-sponsored revision of the UPDRS. Mov Disord. 2008;23(15):2129-2170
- Movement Disorder Society Task Force on Rating Scales for Parkinson Disease. The UPDRS: status and recommendations. Mov Disord. 2003;18(7):738-750
- Postuma RB et al. MDS clinical diagnostic criteria for Parkinson disease. Mov Disord. 2015;30(12):1591-1601
Reviewed by Rahul Singh, Health & Wellness Specialist · Editorial policy