Posterior Shoulder and Rotator Cuff Flashcards
What are the main muscles involved in movement of the shoulder joint?
Deltoid Trapezius Levator scapulae Rhomboids Supraspinatus Teres major
Name the three parts of the deltoid
Posterior
Middle
Anterior
Which part of the deltoid takes over abduction of the shoulder from the supraspinatus beyond 15 degrees?
Middle
What movement is the posterior part of the deltoid responsible for?
Shoulder extension
What movement is the anterior part of the deltoid responsible for?
Shoulder flexion
The trapezius causes the scapula to do what?
Depress, retract and elevate respectively
Which muscle elevates the scapula and inferiorly rotates the glenoid fossa?
Levator scapulae
What are the two rhomboid muscles?
Rhomboid major and rhomboid minor
What are the rhomboids responsible for?
Scapula retraction and inferior rotation of glenoid fossa
Name the rotator cuff muscles
Supraspinatus
Infraspinatus
Teres minor
Subscapularis
The supraspinatus is responsible for what movement?
First 15 degrees of shoulder abduction
Which muscle stabilises the head of humerus in glenoid and laterally rotate at shoulder?
Infraspinatus
The subscapularis does what?
Stabilises head of humerus in glenoid and medially rotates at shoulder
Which movements does the teres major allow?
Adduction and medial rotation at shoulder
What are the attachments of the rotator cuff muscles?
Scapula proximally and tubercles of head of humerus distally
