Abduction of shoulder joint

Movement takes place in :Glenohumeral Joint

0-15 degree – Supraspinatus(Suprascapular N)
15-90 degree -Deltoid(axillary N)
90-120 degree- Deltoid+Short external rotators

Movement takes place in:Scapulothoracic joint

120-180 degree- Serratus anterior(N to SA),trapezius(spinal accessory N)

  1. The shoulder has more muscles which cross that joint than any other in the human body. When I see a patient with an injury to this joint, making sure we keep scar tissue build up to a minimum is critical for long term success.

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