Muscles of the Shoulder 2 Flashcards
Learn the muscle origins, insertions and actions of the shoulder. (3 cards)
1
Q
Deltoid (Posterior fibres)
O; I; A
A
O: Inferior edge of the spine of the scapula.
I: Deltoid tuberosity on lateral humerus.
A: Abduction, extension, horizontal abduction and external rotation of shoulder.
2
Q
Deltoid (Anterior fibres)
O; I; A
A
O: Anterior lateral third of clavicle.
I: Deltoid tuberosity on lateral humerus.
A: Abduction, flexion, horizontal adduction and internal rotation of shoulder.
3
Q
Deltoid (Middle fibres)
O; I; A
A
O: Lateral aspect of acromion.
I: Deltoid tuberosity on lateral humerus.
A: Abduction.
