A member asked:

How can snapping scapula syndrome and thoracic outlet syndrome be related?

A doctor has provided 1 answer
Dr. Laurence Badgley answered

Specializes in General Practice

Muscle imbalances: Imo tos results from superior trapezius (st) weak & collar bone droops toward first rib closing costoclavicular space (between these bones) clipping artery & nerves to arm. Weak st conscripts neighbor levator scapulae (ls) to burden lifting scapula (sc) & 20 lb. Arm. Long & narrow, ls incurs chronic spasm, tendonitis at insertion on superior sc spine (pick-like), & snapping as shoulder rotates.

Answered 12/9/2013

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