Spry Juncture, LLC
How to Evolve Gracefully
Anterior Scalene
Region
Origin & Insertion
['Origin: Transverse processes of C3–C6', 'Insertion: 1st rib (scalene tubercle)']
Synergistic Muscles
['Middle and Posterior scalenes', 'SCM']
Joints
['Cervical vertebrae C3–C6']
Primary Actions
['Elevates 1st rib', 'Neck flexion', 'Lateral neck flexion']
Nerve & Spinal Segment
Cervical spinal nerves C4–C6
Cervical plexus; C4–C6
Interesting
Key landmark in thoracic outlet syndrome. [Grant’s Atlas]
Reversal of Action
Elevate 1st rib during forced inhalation
Common Dysfunctions
Brachial plexus compression, thoracic outlet syndrome
How to Stretch
Neck side bend away with arm depressed.
Trigger Points
How to Strengthen
Lateral neck press into resistance.
Concentric Action
Lateral flexion of cervical spine
Applications:
Important in breathing retraining and thoracic outlet syndrome management
Eccentric Action
Control return from side bend
Isotonic Action
Lateral flexion with band resistance
Related Conditions
['TOS', 'Brachial plexus irritation']
Isometric Action
Hold neck in side flexed position
Exercise Ideas
['Neck side bends', 'Resisted elevation', 'Postural scalene resets']