A person met with an accident in which two long bones of hand were dislocated. Which among the following may be the possible reason ?

Ligament Break

When a person meets with an accident and experiences dislocation of two long bones in the hand, the most likely cause is ligament breakage.

Understanding the Anatomy

The two long bones in the forearm, the radius and ulna, are held together and supported at their joints by ligaments. Ligaments are strong, elastic bands of connective tissue that stabilize the bones by holding them in their proper alignment during movement and physical activities like running, working, or lifting objects.

For instance:

• The annular ligament, a key structure in the elbow joint, ensures the radius remains securely connected to the ulna.
• Any trauma or excessive force applied to these areas during an accident, especially involving sudden impact, twisting, or bending, can lead to the tearing or rupture of these ligaments.

Cause of Dislocation

In an accident, the body undergoes rapid, unanticipated movements or direct impact. If a ligament is torn or overstretched due to this force, it can no longer hold the bones in their anatomical position, leading to bone dislocation. Unlike tendons, which connect muscles to bones, ligaments are solely responsible for maintaining the structural stability of joints.

Why Other Causes Are Less Likely

• Tendon Breakage: While tendons play a vital role in connecting muscles to bones and facilitating movement, their damage would cause issues like pain or inability to move the limb, not bone dislocation.
• Skeletal Muscle Injury: Skeletal muscles are not directly involved in joint stability, as their primary function is to enable movement by pulling on tendons.
• Areolar Tissue: Found around muscles, nerves, and blood vessels, areolar tissue is unrelated to joint stability and would not influence bone dislocation.