Where does the anterior scalene muscle insert?

The anterior scalene muscle inserts at the scalene tubercle on the inner border of the first rib. This anatomical detail is important because the anterior scalene plays a significant role in neck movement and respiratory mechanics, particularly during inspiration. By inserting at this specific location, the muscle helps elevate the first rib when the neck is flexed, contributing to the expansion of the thoracic cavity. This insertion point also places the anterior scalene in proximity to the brachial plexus and subclavian artery, which is vital for clinical considerations regarding potential compression syndromes or injuries in this region. Knowing this precise location helps in understanding both the functional and clinical aspects of the muscle in relation to nearby structures.