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Shoulder Girdle – Anatomy, Function and Common Complaints

The shoulder girdle connects the arm to the trunk and enables a wide range of movement. Learn about its structure, function, and common musculoskeletal issues.

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Things worth knowing about "Shoulder Girdle"

The shoulder girdle connects the arm to the trunk and enables a wide range of movement. Learn about its structure, function, and common musculoskeletal issues.

Shoulder Girdle: Structure, Function and Common Issues

The shoulder girdle (pectoral girdle) is the bony structure that connects the upper limb to the axial skeleton. It consists of the clavicle and the scapula, connected via the sternoclavicular (SC) joint and acromioclavicular (AC) joint.

Unlike the pelvic girdle, the shoulder girdle is not firmly attached to the trunk but is instead suspended by muscles. This allows great mobility of the upper limb but also makes it prone to postural dysfunctions, muscle imbalances, and tension-related pain.

Structure and Function

Clavicle: connects sternum and scapula
Scapula: flat bone on the back, provides the socket for the shoulder joint
SC joint: only true joint between upper limb and trunk
AC joint: connects clavicle with the acromion of the scapula

Functions of the shoulder girdle:

Positioning of the arm in space
Stabilization of the shoulder joint
Muscle attachment site for many upper body and neck muscles

Common Complaints

Upper trapezius tension (especially in desk workers)
Poor posture (e.g. forward shoulder, rounded back)
Movement-related pain due to muscle imbalances
AC or SC joint dysfunction
Neck and tension headaches from girdle misalignment
Reduced shoulder mobility

Treatment and Prevention

Posture correction and ergonomic adjustment
Strengthening scapular stabilizers
Scapular mobility training
Stretching tight muscles (especially chest and neck)
Myofascial release and physiotherapy if needed

Scientific References

Rockwood CA Jr. et al. (2009): The Shoulder – WB Saunders
Neumann DA (2010): Kinesiology of the Musculoskeletal System
Sahrmann SA (2002): Diagnosis and Treatment of Movement Impairment Syndromes

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