Spry Juncture, LLC
How to Evolve Gracefully
Pectoralis Minor
Region
Origin & Insertion
['Origin: Ribs 3–5 near costal cartilage', 'Insertion: Coracoid process of scapula']
Synergistic Muscles
['Serratus anterior', 'Lower trapezius']
Joints
['Scapulothoracic articulation']
Primary Actions
['Depresses and protracts scapula']
Nerve & Spinal Segment
Medial pectoral nerve
Brachial plexus; C8–T1
Interesting
Tightness can compress neurovascular structures. [Netter's]
Reversal of Action
Lift rib cage during breathing with scapula fixed
Common Dysfunctions
Shoulder protraction, thoracic outlet syndrome
How to Stretch
Corner stretch with scapular retraction.
Trigger Points
How to Strengthen
Resisted scapular depression.
Concentric Action
Scapular depression and protraction
Applications:
Tightness linked to rounded shoulders and thoracic outlet syndrome
Eccentric Action
Control return from scapular depression
Isotonic Action
Wall press downs or dips
Related Conditions
['TOS', 'Shoulder impingement']
Isometric Action
Maintain protracted scapula against wall
Exercise Ideas
['Scapular dips', 'Pullover with band', 'Protraction push']