<prompt> Rupture of supraspinatus manifests as -Painful movementsFlat shouldersDifficulty in initiation of abductionDifficulty in abduction after 90  <response>: Supraspinatus is responsible for shoulder abduction for the first 15 degrees. If it is torn completely, the initiation of abduction is impossible. Passive abduction upto 15 degrees allows other muscles to take over for further abduction. 