Glenohumeral Joint

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created 5 years ago by KKBlack
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1

The three joints of the shoulder girdle

Sternoclavicular (SC), acromioclavicular (AC), scapulothoracic

2

Shoulder girdle movement

Movements of the shoulder girdle can be described as movements of the scapula, but it is important to remember that wherever the scapula goes, the clavicle follows.

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Shoulder Girdle Abduction/Protraction

Abduction (protraction): Movement of the scapula laterally away from the spinal column, as in reaching for an object in front of the body

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Shoulder Girdle Adduction/Retraction

Adduction (retraction): Movement of the scapula medially toward the spinal column, as in pinching the shoulder blades together

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Shoulder girdle elevation

Elevation: Upward or superior movement of the scapula, as in shrugging the shoulders

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Shoulder girdle depression

Depression: Downward or inferior movement of the scapula, as in returning to a normal position from a shoulder shrug

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Shoulder girdle upward rotation

Upward rotation: Turning the glenoid fossa upward and moving the inferior angle superiorly and laterally away from the spinal column to assist in raising the arm out to the side

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Shoulder girdle downward rotation

Downward rotation: Returning the inferior angle medially and inferiorly toward the spinal column and the glenoid fossa to its normal position, as in bringing the arm down to the side. (Once the scap- ula has returned to its anatomical position, further downward rotation actually results in the superior angle moving slightly superomedial.)

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Shoulder girdle lateral tilt (outward tilt)

Lateral tilt (outward tilt): Consequential move- ment during abduction in which the scapula rotates about its vertical axis, resulting in posterior movement of the medial border and anterior move- ment of the lateral border.

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Shoulder girdle medial tilt (inward tilt)

Medial tilt (inward tilt): Return from lateral tilt; consequential movement during extreme adduction in which the scapula rotates about its vertical axis, resulting in anterior movement of the medial bor- der and posterior movement of the lateral border

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Shoulder girdle anterior tilt (upward tilt)

Anterior tilt (upward tilt): Consequential rota- tional movement of the scapula about the frontal axis occurring during hyperextension of the gle- nohumeral joint, resulting in the superior border moving anteroinferiorly and the inferior angle mov- ing posterosuperiorly

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Shoulder girdle posterior tilt (downward tilt)

Posterior tilt (downward tilt): Consequential rotational movement of the scapula about the frontal axis occurring during hyperflexion of the glenohumeral joint, resulting in the superior bor- der moving posteroinferiorly and the inferior angle moving anterosuperiorly