NBCOT EXAM QUESTION: Scapulohumeral Rhythm

What is the scapulohumeral rhythm?

1:2 scapula:humerus

2:1 scapula:humerus

1:3 scapula:humerus

3:1 scapula:humerus


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2:1 scapula:humerus - Scapula must move 1 degree for every 2 degrees of humeral movement. Damage will occurs without 2:1 due to insufficient space for movement.

3 comments:

cara said...

Isn't that 1:2?

mpachom said...

Yes... it is 1:2...

Rebecca said...

i just googled it, it is 2:1 glenoHUMORAL: SCAPULOthoracic movement. sor for every 2 degrees the humerus moves, the scapula moves 1 degree. anyone out there care to confirm this is true?!