Glenohumeral Rhythm
This is referred to as "scapulohumeral rhythm."
Scapulohumeral Rhythm.
Phase 1:
Humerus 30° abduction
Scapula minimal movement
Clavicle 0° - 15° elevation
Phase 2:
Humerus 40° abduction
Scapula 20° rotation
Clavicle 30° - 36° elevation
Phase 3:
Humerus 60° abduction 90° external rotation
Scapula 30° rotation
Clavicle 30° - 50° posterior rotation Up to 30° elevation
All of these phases have important input by the Rotator Cuff muscles.
The 4 supporting ligaments of the glenohumeral joint are: -coracohumeral ligament (between the coracoid process and humerus) -3 glenohumeral ligaments (between the glenoid process and the humerus)
subdeltoid
Glenohumeral Joint
The glenohumeral joint which is also known as the "shoulder joint"
The medial roataion is the movement of Glenohumeral joint .
Glenohumeral prefix
The 4 supporting ligaments of the glenohumeral joint are: -coracohumeral ligament (between the coracoid process and humerus) -3 glenohumeral ligaments (between the glenoid process and the humerus)
The only long head of the triceps is related to the moment of glenohumeral joint. This glenohumeral joint is more commonly called as shoulder joint. Whether this long head of the triceps is stretched or not, can not be commented.
-al meaning pertaining to
subdeltoid
The glenohumeral joint (the shoulder joint)
Scapulohumeral rhythm:(describes the timing of movement at these joints during shoulder elevation.)first 30 degrees of shoulder elevation involves a "setting phase": The movement is largely glenohumeral.Scapulothoracic movement is small and inconsistent.after the first 30 degrees of shoulder elevation: The glenohumeral and scapulothoracic joints move simultaneously.Overall 2:1 ratio of glenohumeral to scapulothoracic movement.You can observe scapulohumeral rhythm by palpating the scapula's position as a person elevates the shoulder. Helpful scapular landmarks for palpation are the base of the spine and the inferior angle.Scapulohumeral rhythm serves at least two purposes.It preserves the length-tension relationships of the glenohumeral muscles; the muscles do not shorten as much as they would without the scapula's upward rotation, and so can sustain their force production through a larger portion of the range of motion.It prevents impingement between the humerus and the acromion. Because of the difference in size between the glenoid fossa and the humeral head, subacromial impingement can occur unless relative movement between the humerus and scapula is limited. Simultaneous movement of the humerus and scapula during shoulder elevation limits relative (arthrokinematic) movement between the two bones.
glenohumeral and trochleoginglymoid joints
Glenohumeral Joint
latissimus dorsi & pectoralis major
Coracobrachialis Muscle
The glenohumeral joint which is also known as the "shoulder joint"