Video Action Scapula
an educational animation

 View of Scapula with Isolated Scapular Motions &
 Video Action Scapula Movements of the Pectoral Girdle on the Trunk
To clearly see all elements of these Videos please open in full screen

Watch Each video then reset and pause, slide view bar forward and stop to study each element of the video as needed.  Please see Credits Below

Note near the end of the animation the coming action is labeled as abduction, but actually represents what is referred to as retropulsion which is a term referring to hyperextension of the humerus.  The animation demonstrates hyperextension of the humerus at the glenohumeral joint and identifies this action as retropulsion.  Earlier the animation demonstrations antepulsion a term that refers to flexion of the humerus at the glenohumeral joint.

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The Following Chart Breaks down the Scapular Motions of the Pectoral Girdle on the Trunk as seen in the Video

Raising the top of the shoulder: Elevation of the Scapula

 A combination of   Elevation & Lateral Rotation of Scapula

Muscles

Levator Scapulae

Trapezius, upper part

Rhomboid major and minor


Lowering the top of shoulder: Depression of the Scapula

A combination of Depression & Slight Medial Rotation of Scapula

Muscles

Pectoralis Minor

Trapezius, lower part

Latisimus dorsi

Pectoralis Major, sternocostal part


Forward Projection of the top of the shoulder: Protraction or abduction of the scapula

A combination of Abduction of the Scapula & Lateral  Rotation of the Scapula

Muscles

Serratus Anterior

Pectoralis Minor

Backward projection of the top of the shoulder: Retraction or adduction of the Scapula

A Combination of Adduction of the Scapula & Slight Medial Rotation of the Scapula

Muscles

Rhomboid Major & Minor

Trapezius, middle fibers

Movements of the Scapula in raising the arm over the head "Abduction of the Shoulder Girdle past the motion of the Glenohumeral Joint": throughout this movement the scapula remains in the same plane (frontal plane) which maintains the glenoid fossa orientation providing greater centering and maximum stability of the humeral head

When remaining adducted and initialy medially rotated a combination of scapular motions allows for Abduction of the shoulder or pectoral girdle past the 90 degree limit within the Glenohumeral Joint

  • Lateral Rotation
  • Posterior Tilt
  • Elevation

Muscles

A Combination of agonist, stabilizer and fixator is involved within the motion of the scapula

3D motions within the pectoral girdle is never as pure as simply elevating, depressing, protracting, or retracting the scapula

Muscles that produce lateral rotation of the Scapula in Abduction Are:

Serratus anterior, lower half

Trapezius, upper and lower parts

Movements of the Scapula in returning the arm from overhead: "Adduction of the Shoulder or Pectoral Girdle back to the side or "Neutral Position"

With fixation of the scapula & initial lateral rotation a combination of scapular motions allows for Adduction of the shoulder or pectoral girdle from overhead to neutral position

  • Medial Rotation
  • Anterior Tilt
  • Depression

Muscles

A Combination of agonist, stabilizer and fixator is involved within the motion of the scapula

3D motions within the pectoral girdle is never as pure as simply elevating, depressing, protracting, or retracting the scapula

Muscles that produce medial rotation of the Scapula in Adduction are: Rhomboid major and minor Levator scapulae Pectoralis minor




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References and Resources

These videos are offered for their educational value and accuracy of mateiral is not validated by getmassagesmart.com.  The videos were published on YouTube on June 1,2014  by the YouTube channel mentathlete.  Additional educational materials can be found at http://myanatomy.net and http://mentathlete.com.  Get Massage Smart thanks the Authors of these educational videos Patrice Thiriet and Jean-Michel Grand and for realization Olivier Rastello.  Video reference material was take from: J.M. Grand Master Thesis June 2, 2011 * M. Dufour et M Pillu; Biomecanique Functionnelle - Ed Masson 2008 * J.C. Chanussot et R. G. Danowski; Reeducation en traumatologie du sport - Tome 1 - Ed. Masson 2005 * A. I. Kapandji; Anatomic Funtionelle - Ed. Maloine. 

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