Latissimus Dorsi - Trigger Point Anatomy
A muscle this size, covering so much of the posterolateral ribcage, will also have an influence on diaphragmatic function
A neuromuscular efficient core is required for the latissimus dorsi to provide the necessary forces to carry out some function at the glenohumeral joint.
Neuromuscular inefficiency sets up the foundation for repetitive stress and associated “frozen shoulder”-type symptoms. The latissimus dorsi decelerates lateral rotation, flexion, and abduction of the humerus in the glenohumeral joint.
Latissimus Dorsi - Treating Lower Trigger Point
When the insertion of the latissimus dorsi is flexed, the muscle plays a role in tilting the pelvis in an anterolateral direction.
A bilateral contraction leads to hyperextension of the lower back, with accompanying anterior tilting of the pelvis.
A muscle this size, covering so much of the posterolateral ribcage, will also have an influence on diaphragmatic function.
Any movement of the humerus will have an effect that extends into the thoracolumbar fascia and further down the kinetic chain.
Satellite Trigger Points
Concerning satellite myofascial trigger points, consider the following muscles: pectoralis major, teres major, subscapularis, triceps brachii, scalenes, upper rectus abdominis, iliocostalis, serratus anterior, serratus posterior superior and inferior, lower trapezius, and rhomboids.
Thoracolumbar fascia, which is attached to spinous processes of lower six thoracic vertebrae and all lumbar and sacral vertebrae, (T7– S5) and to intervening supraspinous ligaments.
Posterior part of iliac crest. Lower three or four ribs. Inferior angle of scapula.
Extends flexed arm. Adducts and medially rotates humerus. It is one of the chief climbing muscles, since it pulls shoulders downward and backward, and pulls the trunk up to the fixed arms (therefore also active in swimming front crawl).
Assists in forced inspiration by raising lower ribs.
Antagonists: deltoid, trapezius.
Referred Pain Patterns
The latissimus dorsi generates pain in the mid-thoracic area, including the posterolateral abdominal region.
Pain of an aching nature is often reported in the inferior angle of the scapula and the posterior shoulder.
Referred pain travels down the medial aspect of the humerus into the forearm, hand, and fingers.
Axillary trigger point: a 5–10 cm zone of pain at inferior angle of scapula, with diffuse pain radiating into medial upper extremity into ulnar aspect of hand.
Lower lateral trigger point: triangular pattern from trigger point into brim of pelvis and regimental badge area.
Latissimus Dorsi - Trigger Points are Typically Located on the Free Edge of the Muscle
“Thoracic” back pain that is constant in nature and unrelated to activity, frozen shoulder, thoracic outlet syndrome, back pain turning in bed, dull ache under shoulder blade, sharp pain in back of shoulder when resting on elbows, pain when reaching up to a shelf or changing a light bulb.
Golf, racquet sports, swimming, baseball, cricket, rowing, heavy lifting, gym related, gardening, poor-fitting bra.
C7 neuropathy. Ulnar neuropathy. Subscapular nerve entrapment. Axillary neuropathy. Thoracic outlet syndrome. Cardiopulmonary diseases.
Trigger Point Treatment Techniques
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This trigger point therapy blog is intended to be used for information purposes only and is not intended to be used for medical diagnosis or treatment or to substitute for a medical diagnosis and/or treatment rendered or prescribed by a physician or competent healthcare professional. This information is designed as educational material, but should not be taken as a recommendation for treatment of any particular person or patient. Always consult your physician if you think you need treatment or if you feel unwell.
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