Which muscle is implicated by the Wright Test when testing for pec minor compression?

• A. Pectoralis Minor
• B. Pectoralis Major
• C. Deltoid
• D. Biceps

Answer: (A)

The Wright test targets compression that occurs beneath the pectoralis minor as it runs from the ribs to the coracoid process. In this maneuver, the arm is moved into full abduction with slight extension and external rotation, which tightens the pectoralis minor and narrows the space where the axillary artery and brachial plexus pass under the muscle. If the muscle is tight or hypertonic, this positioning can reproduce vascular or neural symptoms and/or diminish the pulse, indicating pec minor–related compression. The other muscles listed do not occupy that specific space and are not primarily responsible for this type of compression, so the implicated muscle is the pectoralis minor.