## **Core Concept**
The rotator interval is a region in the shoulder joint that is crucial for its stability and mobility. It is located between the supraspinatus and subscapularis tendons. Understanding the anatomy of this region is essential for diagnosing and managing shoulder injuries.

## **Why the Correct Answer is Right**
The structure that passes through the rotator interval is the **coracohumeral ligament**. This ligament plays a significant role in the stability of the shoulder joint. It originates from the coracoid process and inserts into the humerus, providing crucial support to the joint. The rotator interval is a potential weak point in the shoulder joint's stability, and injuries to this area can lead to shoulder instability.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because it does not accurately represent a structure known to pass through the rotator interval.
- **Option B:** This option is incorrect as it does not specify a structure that is associated with the rotator interval.
- **Option C:** Although not explicitly listed, if this were a common tendon or ligament, it would be incorrect because the specific structure known to pass through the rotator interval is the coracohumeral ligament.
- **Option D:** This option is incorrect because, similar to options A and B, it does not accurately describe the coracohumeral ligament.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that injuries to the rotator interval can lead to **multidirectional shoulder instability**. Clinicians should be aware that patients with such injuries may present with a history of recurrent shoulder dislocations in multiple directions. Understanding the anatomy and function of the rotator interval and its contents is critical for diagnosing and managing these complex shoulder injuries.

## **Correct Answer:** B. Coracohumeral ligament