**Question:** The contents of the aponeurotic adductor canal of Hunter are all, EXCEPT:

A. Pectineus muscle
B. Sartorius muscle
C. Adductor longus muscle
D. Adductor brevis muscle

**Core Concept:**

The aponeurotic adductor canal, also known as Hunter's canal, is a passage within the adductor compartment of the thigh. It contains the aponeuroses of the adductor muscles that merge to form a single aponeurosis, which inserts onto the medial femoral condyle. The adductor muscles are responsible for adducting the thigh and hip joint.

**Why the Correct Answer is Right:**

The correct answer is **D.** Adductor pollicis muscle, as it is not part of the adductor compartment. The adductor compartment contains muscles that are responsible for adducting the thigh and the hip joint. Adductor pollicis is a muscle of the forearm and is not involved in the function of the adductor compartment.

**Why Each Wrong Option is Incorrect:**

A. **Pectineus muscle**: It is a part of the adductor compartment and is responsible for adducting the thigh and the hip joint.
B. **Sartorius muscle**: It is also a part of the adductor compartment and is involved in adduction of the thigh and hip joint.
C. **Adductor longus muscle**: Although Adductor longus muscle is not a common choice for exams, it is still included in the adductor compartment and is involved in adducting the thigh and the hip joint.

**Clinical Pearl:**

Understanding the anatomy and function of muscle compartments is essential for various clinical scenarios, such as diagnosing compartment syndromes, managing compartment pressure, and recognizing compartment-related pain syndromes. This knowledge is crucial for treating patients with acute or chronic pain in the thigh or hip region.