Acromion Clavicular Joint
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ROM Measurements
Approximately 20-30 degrees of upward/downward rotation
Accessory Joint Structures
Articular disc, Acromioclavicular, coracoclavicular ligaments
Articulating Bones
Clavicle and Acromion of Scapula
Concave and Convex Surfaces
Clavicle's convex surface glides on acromion's flat surface.
Osteokinematic Movements
Gliding of the clavicle on the acromion
Specific Joint Type
Plane (gliding) joint
iType of Movement
Pure glide without roll or spin.
Direction of Movements
Upward rotation during arm abduction, downward rotation during arm adduction.