Acromion Process and Head of Humerus. Permission Joseph E. Muscolino. Kinesiology - The Skeletal System and Muscle Function, 3rd ed. Elsevier, 2017).

Six Causes of Shoulder Impingement Syndrome – Part 3

Another reason for shoulder impingement syndrome to occur is insufficient elevation of the clavicle. Most of scapular upward rotation is actually caused by elevation of the clavicle at the sternoclavicular joint, so if clavicular elevation is prevented for any reason, shoulder impingement syndrome can occur.

there are four types/locations of possible thoracic outlet syndrome seen here

Thoracic Outlet Syndrome

Thoracic outlet syndrome is a condition that causes compression of nerves and/or blood vessels where the thorax outlets into the upper extremity.

Superficial anterior view of the muscles of the neck

Musculature of the Cervical Spine

To perform orthopedic manual therapy to the neck that is accurate and specific, we need to know the attachments and actions of the muscles of the neck.