Medical Research Council (MRC) sum score

Muscle group	Strength grade
Shoulder extension (deltoid)	0 to 5
Elbow flexion (biceps, brachialis)	0 to 5
Wrist extension (extensor carpi radialis/ulnaris)	0 to 5
Hip flexion (iliopsoas)	0 to 5
Knee extension (quadriceps femoris)	0 to 5
Ankle dorsiflexion (tibialis anterior)	0 to 5
TOTAL	0 to 60

Description	Strength grade
Full power	5
Active movement against gravity and resistance	4
Active movement against gravity	3
Active movement (without gravity)	2
Trace movement	1
No movement	0

From: Kleyweg RP van der Meché FG, Schmitz PI. Interobserver agreement in the assessment of muscle strength and functional abilities in Guillain-Barré syndrome. Muscle Nerve 1991; 14:1103. https://onlinelibrary.wiley.com/doi/10.1002/mus.880141111. Copyright © 1991 John Wiley & Sons Ltd. Reproduced with permission of John Wiley & Sons Inc. This image has been provided by or is owned by Wiley. Further permission is needed before it can be downloaded to PowerPoint, printed, shared or emailed. Please contact Wiley's permissions department either via email: [email protected] or use the RightsLink service by clicking on the 'Request Permission' link accompanying this article on Wiley Online Library (https://onlinelibrary.wiley.com/).

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Medical Research Council (MRC) sum score