Spry Juncture, LLC
How to Evolve Gracefully
Serratus Posterior Superior
Region
Origin & Insertion
['Origin: Spinous processes of C7–T3', 'Insertion: Superior borders of ribs 2–5']
Synergistic Muscles
['External intercostals', 'Scalenes']
Joints
['Costovertebral joints']
Primary Actions
['Elevates ribs 2–5 during inspiration']
Nerve & Spinal Segment
Ventral rami of T2–T5 spinal nerves
Thoracic spinal nerves; no plexus
Interesting
Small role in inspiration; often mistaken for rhomboid tightness. [Moore’s]
Reversal of Action
Anchor ribs while assisting neck lift
Common Dysfunctions
Neck/upper back stiffness, breathing pattern dysfunction
How to Stretch
Foam roll upper back with reach.
Trigger Points
How to Strengthen
Diaphragmatic breathing with thoracic expansion.
Concentric Action
Elevate ribs during inhalation
Applications:
Useful in breath therapy for postural thoracic extension
Eccentric Action
Control rib descent during exhale
Isotonic Action
Resisted breathing drills
Related Conditions
['Thoracic restriction', 'Shallow breathing']
Isometric Action
Sustain upper rib elevation
Exercise Ideas
['Wall slides with breath', 'Serratus punches', 'Deep breath in prone']