Intrinsic Shoulder Muscles Quiz

Which of the following muscles is NOT discussed in the video?

• Teres Minor

• Infraspinatus

• Teres Major

• Supraspinatus

Where does the supraspinatus muscle originate?

• Infraspinous fossa

• Supraspinous fossa

• Lateral border of the scapula

• Acromion

What is the primary action of the supraspinatus muscle?

• Flexion

• Adduction

• External rotation

• Initiation of abduction

Where does the infraspinatus muscle insert?

• Lesser tubercle

• Middle facet of the greater tubercle

• Lower facet of the greater tubercle

• Superior facet of the greater tubercle

What action is facilitated by the contraction of the infraspinatus muscle?

• Internal rotation

• External rotation

• Extension

• Abduction

From where does the teres minor muscle originate?

• Upper 2/3 of the posterior surface of the lateral border of the scapula

• Supraspinous fossa

• Acromion

• Infraspinous fossa

Which of the following actions is NOT performed by the teres minor muscle?

• Flexion

• External rotation

• Adduction

• Abduction

What is the common insertion point for the supraspinatus, infraspinatus, and teres minor muscles?

• Greater tubercle

• Coracoid process

• Lesser tubercle

• Acromion

Which muscle is responsible for initiating the abduction of the humerus?

• Teres Minor

• Deltoid

• Infraspinatus

• Supraspinatus

Which muscle assists in both external rotation and adduction of the humerus?

• Infraspinatus

• Subscapularis

• Teres Minor

• Supraspinatus