The underarm area, also known as the axilla or armpit, contains several muscles. There isn't one single muscle solely designated as "the underarm muscle." However, a key muscle in this region is the subclavius muscle. The subclavius, along with the pectoralis major and pectoralis minor, contributes to the overall structure of the axilla.
Muscles of the Axilla (Armpit)
The axilla is a complex area with multiple muscles contributing to its structure and function. While the subclavius is a prominent muscle in the area, it's crucial to understand that numerous other muscles interact and influence the movement and stability of the arm and shoulder, indirectly impacting the underarm region.
- Subclavius Muscle: This muscle is specifically located in the axilla and plays a role in shoulder stability. (Reference: Along with the pectoralis major and pectoralis minor, the subclavius muscle forms the axilla or armpit. 03-Jul-2020)
- Pectoralis Major and Minor: These chest muscles are adjacent to the axilla and significantly influence arm movement and the overall structure of the underarm region. (Reference: Along with the pectoralis major and pectoralis minor, the subclavius muscle forms the axilla or armpit. 03-Jul-2020; Each breast lies over a large muscle (called the pectoralis major muscle) on the chest.)
- Other Contributing Muscles: Muscles of the shoulder and upper arm indirectly affect the underarm region's structure and function.
Understanding the Axilla's Complexity
It is important to remember that the axilla is not just a space filled by muscles, but also contains blood vessels, nerves, and lymph nodes. The various muscles interact to provide a wide range of motion and stability to the arm and shoulder.
