Scapulohumeral Rhythm
What is the clinical relevance of the scapulohumeral rhythm? How can it affect your ROM measurements of the shoulder? Please give at least 5 reasons in your response.
The scapulohumeral rhythm is an important collaborative movement between the glenoid fossa of the scapula and the head of the humerus. This movement needs to be synchronous to allow for optimal shoulder elevation movement. For this motion to occur, the glenoid fossa has to rotate upward and tilt posteriorly so that it can accept the head of the humerus as it rolls superiorly. We also need lateral rotation to allow for shoulder flexion and abduction, which together forms the shoulder elevation movement. When the scapula and humerus maintain this connection with each other, you have synchronous movements at the shoulder complex which allows full ROM and in turn creates the scapulohumeral rhythm.
If there is a congruent ratio of movement between the scapula and the head of the humerus, then the ROM measurements should be a full 180 degrees of motion at the shoulder. If there is inadequate scapulohumeral rhythm, then the ROM measurements at the shoulder will be reduced, and full ROM will not be achieved. This could be because of an impingement in the subacromial space, which could mean that the client does not have full ROM because their scapulohumeral rhythm has been impaired.
The scapulohumeral rhythm is an important collaborative movement between the glenoid fossa of the scapula and the head of the humerus. This movement needs to be synchronous to allow for optimal shoulder elevation movement. For this motion to occur, the glenoid fossa has to rotate upward and tilt posteriorly so that it can accept the head of the humerus as it rolls superiorly. We also need lateral rotation to allow for shoulder flexion and abduction, which together forms the shoulder elevation movement. When the scapula and humerus maintain this connection with each other, you have synchronous movements at the shoulder complex which allows full ROM and in turn creates the scapulohumeral rhythm.
If there is a congruent ratio of movement between the scapula and the head of the humerus, then the ROM measurements should be a full 180 degrees of motion at the shoulder. If there is inadequate scapulohumeral rhythm, then the ROM measurements at the shoulder will be reduced, and full ROM will not be achieved. This could be because of an impingement in the subacromial space, which could mean that the client does not have full ROM because their scapulohumeral rhythm has been impaired.
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