What is the name of the opening at the apex of the axilla?

The opening at the apex of the axilla is referred to as the cervicoaxillary canal. This anatomical feature is significant because it serves as a passageway between the neck (cervical region) and the axillary (armpit) area, facilitating the connection of various structures including blood vessels and nerves that travel between these two regions.

The cervicoaxillary canal's borders are defined by the clavicle anteriorly, the first rib laterally, and the upper edge of the scapula posteriorly. It is important for the proper functioning of the upper limb, as it allows major nerves and blood vessels, such as the brachial plexus and axillary artery, to access the arm.

In contrast, the axillary canal typically refers to the area within the axilla itself and does not specifically denote the opening. The intercostal canal pertains to the spaces between the ribs and is not relevant in this context, while the brachial canal doesn’t exist as a standard anatomical term associated with the axilla. Thus, the cervicoaxillary canal is the correct term for the specified anatomical location.