All of the following movements occur during abduction of shoulder, except?
**Core Concept**
The abduction of the shoulder involves the movement of the arm away from the body in the coronal plane, which requires the coordinated action of multiple joints and muscles. This movement is primarily facilitated by the **glenohumeral joint** and the **acromioclavicular joint**. The **scapulothoracic joint** also plays a crucial role in this movement.
**Why the Correct Answer is Right**
To determine the correct answer, we must consider the movements that occur during shoulder abduction. The movement of the arm away from the body involves upward rotation, elevation, and slight protraction of the scapula. However, the specific details of the correct answer are not provided, so we will proceed to analyze the options based on general knowledge of shoulder movement.
**Why Each Wrong Option is Incorrect**
**Option A:** Without specific details, we cannot directly address why each option is incorrect. Normally, we would discuss how each option either does or does not contribute to the movement of shoulder abduction, considering factors like **supraspinatus** initiation, **deltoid** participation, and **trapezius** and **serratus anterior** roles in scapular rotation and stabilization.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that the full range of shoulder abduction, up to 180 degrees, involves both glenohumeral movement and scapular rotation. The first 15-30 degrees are primarily glenohumeral, and beyond that, the movement is a combination of glenohumeral and scapulothoracic movements.
**Correct Answer:** Correct Answer: D. External Rotation.