Manual muscle testing (MMT) in the ICU using the Medical Research Council (MRC) Scoring system for occupational therapy.
No visible contraction
Visible muscle contraction, but no limb movement
Active movement, but not against gravity
Active movement against gravity
Active movement against gravity and resistance
Active movement against full resistance
*Adapted from Schweickert and Hall. ICU-Acquired Weakness. Chest 2007;31:1541−1549.
Measurement (Short version for ICU)
Each Upper Extremity: shoulder abduction, elbow flexion, wrist extension
Each Lower Extremity: hip flexion, knee extension, dorsiflexionAdler, J., & Malone, D. (2012). Early mobilization in the intensive care unit: a systematic review. Cardiopulmonary physical therapy journal, 23(1), 5.
Minimum score: 0 = quadruplegia
Maximum score: 60 (4 extremities, 3 movements per extremity, 15 points per extremity.