Thoracic Outlet Syndrome (TOS) is a compression dysfunction that can occur in 3 different areas of the neck/upper arm. It can be in one or more locations at a time.
Anterior/Middle Scalene
Involves the Anterior and the Middle Scalene. Both of which are located in the anterior/lateral part of the neck. When either or both of these muscles are tight or in a shortened state it may put pressure on the nerve bundle known as the Brachial Plexus.
Clavicle/First Rib
Compression of the Brachial Plexus or the Subclavian Vein/Artery. The compression in this location can be cause by muscle tightness, subluxation of the rib or clavicle or other structural causes.
Pectoralis Minor
Under Pec Major, Pec minor attaches to the coracoid process on the Scapula. Between these two structures run the Brachial Plexus and Subclavian vein/artery. If Pec Minor is tight it pulles the coracoid towards it resulting in compression of the neurovascular bundle.
Symptoms
Symptoms listed may or may not occur pending on the severity and cause
Numbness or tingling in your arm or fingers
Pain or aches in your neck, shoulder, arm or hand
Weakening grip
Cool/cold arm, hand &/or fingers
Swelling
Arm fatigue
Many more.
Causes
Muscular Dysfunctions
Extra first rib - Cervical Rib
Fracture to the clavicle
Other bony abnormalities
Contributing Factors
Tumors or large lymph nodes in the upper chest or underarm area
Stress or depression
Participating in sports that involve repetitive arm or shoulder movement, such as baseball, swimming, golfing, volleyball and others
Repetitive injuries from carrying heavy shoulder loads
Injury to the neck or back (whiplash injury)
Poor posture
Weightlifting
Contributing Factors Reference link
What Can Massage Do?
Massage can help aid in relaxation, decrease muscle tension which in turn helps decompress the affected structures.
It can also help decrease stress, Massage has also been proven to aid in increase sleep quality as well.
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