scapulohumeral rhythm
Pronunciation: skap-yuh-lo-HYOO-mer-al
Coordinated movement pattern between the scapula and humerus during shoulder elevation.
Full Definition
Scapulohumeral rhythm describes the coordinated movement pattern between the scapula and humerus that occurs during shoulder elevation movements. The normal ratio is approximately 2:1, meaning for every 3 degrees of shoulder elevation, 2 degrees occur at the glenohumeral joint and 1 degree occurs through scapular upward rotation. Disruption of this rhythm is common following shoulder injuries and surgeries, requiring specific rehabilitation interventions to restore normal movement patterns and prevent compensatory strategies.
Usage
Usage note: Do not hyphenate when used as a noun phrase; may hyphenate when used as adjective modifier.
In Context
- "Assessment revealed altered scapulohumeral rhythm with early scapular elevation during arm raising." — Movement analysis report