Insertion of levator scapulae is-
**Core Concept**
The levator scapulae muscle is a deep muscle of the neck that plays a crucial role in scapular rotation and elevation. It is one of the four muscles that form the scapular wall, along with the trapezius, rhomboids, and serratus anterior.
**Why the Correct Answer is Right**
The levator scapulae muscle inserts onto the superior angle and the medial border of the scapula, specifically the supraspinous fossa and the medial edge of the spine of the scapula. This insertion allows for the muscle's primary function of upward rotation and elevation of the scapula. The muscle's insertion also helps to stabilize the scapula and maintain proper scapulohumeral rhythm during shoulder movements.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect - The rhomboid muscles insert onto the medial border of the scapula, but not the levator scapulae.
**Option B:** Incorrect - The trapezius muscle inserts onto the lateral third of the clavicle, acromion process, and scapular spine, but not the levator scapulae.
**Option C:** Incorrect - The serratus anterior muscle inserts onto the costal surface of the scapula, but not the levator scapulae.
**Clinical Pearl / High-Yield Fact**
Remember the scapular muscles' insertion points to accurately diagnose and treat scapular dyskinesis and winged scapula.
**Correct Answer:** C. The supraspinous fossa and the medial edge of the spine of the scapula.