Step 1: Terminology Definition
- Sprain: Injury to ligaments, involving stretching or tearing. Ligaments connect bones at joints.
- Strain: Damage to muscles or tendons, excluding ligaments.
- Contusion: A bruise, typically from blunt force impact.
- Avulsion: A bone fragment detached by a tendon or ligament.
Step 2: Scenario Analysis
The description states "stretching or tearing of his ligaments." This precisely matches the definition of a sprain. Sprains commonly occur in joints such as the ankle, knee, or wrist due to sudden twists or impacts.
Step 3: Conclusion
Given the involvement of ligaments, the injury is diagnosed as a sprain.