How is Normal Shoulder Joint:

Fig: Inside the shoulder joint

 

Fig: Xray of normal Shoulder Joint 

Components of Shoulder Joint:
Bones

The shoulder is made up of 4 joints

  1. Sternoclavicular (SC)
  2. Acromioclavicular (AC)
  3. Scapulothoracic joints 
  4. Glenohumeral joint
Fig: Joints in Shoulder

Cartilage:

  • Articular cartilage is the smooth, white tissue. It covers the ends of bones where they come together to form joints. 
  • Healthy cartilage in our joints makes it easier to move. 

It allows the bones to glide over each other with very little friction.

Fig: Shoulder Articular Cartilages

Ligaments

  • Ligaments hold the bones together and provide stability. 
Fig: Shoulder ligaments 

Synovium

  • The synovium is a thin cover that wraps around the bones in your joint. It makes a fluid that provides lubrication so your bones can move easily without resistance.

 

Bursa

  • The bursa is a fluid-filled sac that provides cushioning and a smooth surface for the bones, muscles and tendons in your joints to move on.
Fig: Bursa in shoulder joint

Tendons 

  • Tendons are fibrous bands of tissue that connect your muscles to your bones.

 

Muscles 
Rotator cuff

The rotator cuff is a group of muscles in the shoulder that allow a wide range of movement while maintaining the stability of the glenohumeral joint 

  • Subscapularis
  • Infraspinatus
  • Teres minor
  • Supraspinatus 
Fig: Muscles around Shoulder

Normally, all of these components work in harmony. But disease or injury can disrupt this harmony, resulting in pain, muscle weakness, and reduced function.
To maintain the fitness of all components, get to know your joint by Dr Sachin Karkamkar.

 


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Disclaimer: The information provided here should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. The information is provided solely for educational purpose and should not be considered a substitute for medical advice.