Latissimus dorsi Shoulder Extension

Latissimus dorsi Shoulder Extension

ACTION REVIEW FOR THE Latissimus dorsi MUSCLE

Latissimus dorsi Shoulder Extension is its Action Described As:

  • Shoulder Extension at the Glenohumeral Joint as in extending the arm to throw a base ball, swining an ax, or swimming and is often referred to as the swimmers muscle.

SYNERGISTS: assist in performing the action of shoulder extension

  • Posterior deltoid
  • Teres major 
  • Long head of triceps

Fixators:  These muscles maintain dynamic control to allow for extension of the shoulder at the glenohumeral joint.

  • Scapular muscles
  • Rectus abdominis
  • Oblique quadratus lumborum
  • Erector spinae

Stabilizers: Rotator cuff

  • Supraspinatus
  • Infraspinatus
  • Teres minor
  • Subscapularis

Antagonists: Muscles that perform the opposite action to the agonist in this case Iliopsoas & Hip Flexion

  • Anterior deltoid
  • Pectoralis major (clavicular head)
  • Coracobrachialis
  • Biceps brachii

See The Latissimus dorsi in Motion

Get Massage Smart offers the above anatomical information for its  educational value and dose not validate its accuracy. Please refer to the following texts and resources. 

References & Resources for the muscle anatomy information are:

Sieg and Adams: "Illustrated Essentials of Musculoskeletal Anatomy", 4th edition, 2002, Megabooks Inc,

Muscolino J E: The Muscular System Manual, The Skeletal Muscles of the Human Body, ed 3, 2009,
Elsevier/Mosby. 

University of Michigan Medical School: Muscle Tables & Illustrations

brentbrookbush.com

EX.RX.net 

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