2 doctors weighed in:

What are the 7 shoulder extensor muscles?

2 doctors weighed in
Dr. Theodore Shybut
Sports Medicine
1 doctor agrees

In brief: Post deltoid, lats +

Major extensors include the posterior deltoid, latissimus dorsi, teres major other muscles with extension moments include the subscapularis, long head of the triceps, infraspinatus, teres minor. The sternal head of the pectoralis major can have an extensor moment when the arm is in a forward flexed, internally rotated position.

In brief: Post deltoid, lats +

Major extensors include the posterior deltoid, latissimus dorsi, teres major other muscles with extension moments include the subscapularis, long head of the triceps, infraspinatus, teres minor. The sternal head of the pectoralis major can have an extensor moment when the arm is in a forward flexed, internally rotated position.
Dr. Theodore Shybut
Dr. Theodore Shybut
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