All the muscles are used to abduct the shoulder except -
Muscles responsible for abduction of the shoulder joint
-        Supraspinatus- first 15 degrees of abduction
-        Deltoid (Acromial fibers)- it is responsible for abduction from 15 to 90 degrees.
-        Trapezius and serratus anterior- They are responsible for upward rotation of the glenoid cavity.
Deltoid
Supraspinatus
Serratus anterior
Pectoralis major