Axillary Cavity File

Anatomy, Shoulder and Upper Limb, Axilla - StatPearls - NCBI

The axilla is defined by several muscular and skeletal landmarks that shift shape with shoulder movement: axillary cavity

: The narrowest part, formed by the intertubercular sulcus (bicipital groove) of the humerus. Core Contents Anatomy, Shoulder and Upper Limb, Axilla - StatPearls

: Primarily composed of the pectoralis major and pectoralis minor muscles. Shoulder and Upper Limb

The , commonly referred to as the axilla or "armpit," is a four-sided pyramidal space located at the junction of the upper limb and the thorax. It serves as a vital gateway for neurovascular and lymphatic structures traveling between the neck/torso and the upper extremity. Anatomical Boundaries