Shoulder Muscles

Question 1

Serratus anterior

Answer 1

-Protraction, prevents swinging
-origin: ribs 1-8/9
-insertion: anterior surface of medial scapular

Question 2

Trapezius

Answer 2

Elevation, Retraction, rotation of scapula
-origin: occipital bone, nuchal ligament, spinous process (c7-T-12)
-insertion: clavicle, acromion, spine of scapula

Question 3

Levator scapulae

Answer 3

Elevated scapula
-origin: transverse process of c1-c4
-insertion: medial border of scapula

Question 4

Lattisimus dorsi

Answer 4

Extension, addiction, internal rotation of scapula
-origin: thoracolumbar fascia, iliac crest, lower ribs
-insertion: intertubbercular groove of humerus

Question 5

Teres major

Answer 5

Extension, adduction, internal rotation of scapula
-origin: inferior angle of scapula
-insertion: medial lip of bicipital groove (humerus)

Question 6

Pectoralis major

Answer 6

Flexion, adduction, internal rotation
-origin: clavicle, sternum, costal cartilages (1-6)
-insertion: lateral lip of bicipital groove (humerus)

Question 7

Pectoralis minor

Answer 7

Scapula stabilisation
-origin: ribs 3-5
-insertion: coracoid process of scapula

Question 8

Deltoid

Answer 8

Abduction, flexion, extension
-origin: lateral clavicle, acromion, spine of scapula
-insertion: deltoid tuberosity (humerus)