A 20-years old male presents with anterior shoulder dislocation. This injury is usually caused as a combination of which of the following –
**Core Concept**
The anterior shoulder dislocation is a type of traumatic injury to the shoulder joint, characterized by the displacement of the humeral head from the glenoid cavity. This injury often occurs due to a combination of factors, including a direct blow to the shoulder or a fall on an outstretched hand.
**Why the Correct Answer is Right**
The anterior shoulder dislocation is usually caused by a combination of abduction and external rotation of the shoulder joint. This mechanism of injury involves the contraction of the deltoid muscle and the supraspinatus muscle, leading to the displacement of the humeral head from the glenoid cavity. The humerus is forced anteriorly, resulting in the characteristic dislocation.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the common mechanism of injury for anterior shoulder dislocation.
**Option B:** This option is incorrect because it refers to a different type of shoulder injury, known as a posterior shoulder dislocation.
**Option C:** This option is incorrect because it is a less common mechanism of injury for anterior shoulder dislocation.
**Clinical Pearl / High-Yield Fact**
It's essential to remember the "ABOVE" mnemonic, which stands for Abduction, External Rotation, and Valgus stress, to recall the common mechanism of injury for anterior shoulder dislocation.
**Correct Answer:** C.