Muscles from the scapula to the humerus

Question 1

Which muscles make up the rotator cuff?

Answer 1

Subscapularis, Supraspinatous, Infraspinatous, Teres Minor

Question 2

Points of Attachment and Action of subscapularis

Answer 2

Subscapular fossa of the scapula to the lesser tubercle of the humerus.
Internal rotation of the arm and extension

Question 3

Points of Attachment and Action of supraspinatous

Answer 3

Supraspinous fossa of the scapula to the greater tubercle of the humerus
Initiates abduction of the arm

Question 4

Points of Attachment and Action of infraspinatous

Answer 4

Infraspinous fossa of the scapula to the greater tubercle

External rotation of the arm

Question 5

Points of Attachment and Action of Teres Minor

Answer 5

Upper two thirds of the lateral margin of the scapula to the greater tubercle

External rotation and adduction of the arm

Question 6

Points of Attachment and Action of Teres Major

Answer 6

Dorsal surface of the inferior angle of the scapula to the crest of the lesser tubercle
Internal rotation, adduction and extension of the arm

Question 7

Points of Attachment and Action of Coracobrachialis

Answer 7

Coracoid process to the upper third of the frontal humerus

Flexion, adduction and internal rotation