Scapular winging.

Note the origin and insertion of the serratus anterior muscle.

http://www.vancouveryoga.com/anatomy_serratusanterior.html

http://commons.wikimedia.org/wiki/Image:Gray202.png



http://www.exrx.net/Muscles/SerratusAnterior.html


If it becomes weak or stops working due to issues with the long thoracic n., scapular winging can occur...

Scapular winging looks like this:



http://www.injuryupdate.com.au/images/injury_details/shouldernerve.JPG




http://www.maitrise-orthop.com/corpusmaitri/orthopaedic/112_kelly/kelly-fig10.jpg




www.thieme-connect.com/.../200102/jrm00698.01




http://www.med.nyu.edu/neurosurgery/pns/images/Fig37.jpg