The suprascapular nerve lies over the shoulder blade and supplies two important rotator cuff muscles, the supraspinatus, and the infraspinatus.  Compression of the suprascapular nerve can occur due to swelling in the region (paralabral ganglion),  thickening of the ligament (superior transverse scapular ligament), or repeated injury in overhead athletes such as tennis players. It causes pain and wasting of the muscles leading to weakness of the shoulder. Early treatment is necessary to avoid permanent damage to the muscles. Physiotherapy can be helpful initially, however, with obvious compression, surgical release of the nerve may be necessary.