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Latissimus Dorsi

Region

Origin & Insertion

['Origin: Spinous processes of T7–T12, thoracolumbar fascia, iliac crest, inferior 3–4 ribs', 'Insertion: Intertubercular groove of humerus']

Synergistic Muscles

['Teres major', 'Pectoralis major']

Joints

['Glenohumeral joint']

Primary Actions

['Shoulder extension', 'Adduction', 'Internal rotation']

Nerve & Spinal Segment

Thoracodorsal nerve

Brachial plexus; C6–C8

Interesting

Important for pull-ups and swimming. [Gray’s Anatomy]

Reversal of Action

Common Dysfunctions

Limited shoulder extension and adduction, winged scapula compensation

How to Stretch

Overhead reach with lateral trunk lean.

Trigger Points

How to Strengthen

Pulling and rowing motions.

Concentric Action

Applications:

Eccentric Action

Isotonic Action

Related Conditions

['Shoulder impingement', 'Scapular winging']

Isometric Action

Exercise Ideas

['Lat pulldown', 'Seated row', 'Pull-up']

Spry Juncture, LLC

How to Evolve Gracefully