Which bony landmark corresponds best with the insertion site of the supraspinatus muscle when using iontophoresis?

The supraspinatus muscle inserts on the greater tubercle of the humerus. This muscle is one of the rotator cuff muscles and plays a vital role in shoulder stability and movement, particularly in initiating abduction of the arm. When utilizing iontophoresis for therapeutic purposes, it is critical to target this specific area to effectively deliver medications to the tissue surrounding the muscle or to treat conditions related to the rotator cuff.

The relevance of the greater tubercle as the insertion point also ties into the anatomical relationships within the shoulder that can affect both function and pathology. Understanding these relationships is crucial for effective treatment in therapeutic settings, such as when using modalities like iontophoresis, which aims to enhance the delivery of medicine through the skin to the underlying muscles and structures.

In contrast, the lesser tubercle of the humerus serves as the insertion point for the subscapularis muscle, the supraspinous fossa of the scapula is the origin of the supraspinatus rather than its insertion, and the deltoid tuberosity provides an attachment for the deltoid muscle, making these landmarks less relevant in the context of targeting the supraspinatus with iontophoresis. Thus, understanding