Suspensory ligament of Lockwood encloses which pair of muscles
**Core Concept**
The suspensory ligament of Lockwood is a fibrous structure that provides support to the eye and plays a crucial role in the anatomy of the orbit. It is a fascial condensation that encloses a specific pair of extraocular muscles, which are essential for eye movement.
**Why the Correct Answer is Right**
The suspensory ligament of Lockwood encloses the inferior rectus and inferior oblique muscles. This is because these muscles are located in the inferior part of the orbit and require support to maintain their position. The inferior rectus muscle is responsible for eye movement downwards, while the inferior oblique muscle is involved in rotating the eye laterally and moving it upwards. The suspensory ligament of Lockwood helps to keep these muscles in place and prevent them from being displaced during eye movements.
**Why Each Wrong Option is Incorrect**
* **Option B:** The superior rectus and superior oblique muscles are located in the superior part of the orbit and are not enclosed by the suspensory ligament of Lockwood. These muscles are responsible for eye movement upwards and medially.
* **Option C:** The medial rectus and lateral rectus muscles are not enclosed by the suspensory ligament of Lockwood. These muscles are involved in eye movement medially and laterally, respectively, and are located in different parts of the orbit.
* **Option D:** The inferior rectus and lateral rectus muscles are not enclosed by the same suspensory ligament of Lockwood. The lateral rectus muscle is involved in eye movement laterally and is located in the superolateral part of the orbit.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that the suspensory ligament of Lockwood is a fibrous structure that provides support to the inferior rectus and inferior oblique muscles. This knowledge is crucial in understanding the anatomy of the orbit and the mechanics of eye movement.
**✓ Correct Answer: A. Inferior rectus and inferior oblique**