Elastic Band Tethers – axilla
The axilla is perhaps the most dynamically complex area of the body when it comes to form and function. A thick, transversely oriented, fascia-like band runs through the Cinderella Layer in continuity with the medial arm and chest fascia. Acting like an elastic tether to the dermis, it maintains a hollow contour to the armpit throughout the huge range of motion of the arm at the shoulder joint. These attachments also reinforce a musculoskeletal stop that protects the major nerves running through your axilla to your arms and hands from stretch injuries as you reach for the sky. In addition, a honeycomb pattern of long, vertical and oblique elastic tethers extend deep into the axillary hollow helping to maintain its unique shape.
Axilla
A thick, subcutaneous ligamentous structure is attached to the skin and extends to the medial arm and chest fascia. It facilitates stretch and recoil in the uniquely contoured axilla.
This elastic-band tether runs through the fat and above the muscles. It helps maintain the contour of the axillary hollow even when stretched and protects against hyperextension.
Tethers in relaxed position.
Elastic recoil of the tethers with adduction of the arm toward the body maintains the contour of the axillary hollow.
Stretching of tethers with abduction of the arm away from the body adds tension to help prevent hyperextension injuries.